Measurement of vessels for the Panama Canal


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Measurement of vessels for the Panama Canal
Physical Description:
Canal Zone -- Executive Office
Panama Canal Press ( Mount Hope, C.Z )
Publication Date:

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Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 30992240
oclc - 4222827
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Table of Contents
    Front Cover
        Front Cover 1
        Front Cover 2
    Title Page
        Page 1
        Page 2
        Page 3
    Table of Contents
        Page 4
    Statutory provisions
        Page 5
    Panama Canal toll rates
        Page 6
    Fuel allowance for vessels in ballast
        Page 7
    Transit for repairs or entering drydock
        Page 8
    Rules for the measurement of vessels for the Panama Canal
        Page 9
        Page 10
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16
        Page 17
        Page 18
        Page 19
        Page 20
        Page 21
        Page 22
        Page 23
        Page 24
        Page 25
        Page 26
        Page 27
        Page 28
        Page 29
        Page 30
        Page 31
        Page 32
        Page 33
        Page 34
        Page 35
    Appendix. Interpretations and explanatory notes
        Page 36
        Page 37
        Page 38
        Page 38a
        Page 38b
        Page 39
        Page 40
        Page 41
        Page 42
        Page 43
        Page 44
        Page 45
        Page 46
        Page 47
        Page 48
    Back Matter
        Back Matter 1
        Back Matter 2
        Back Matter 3
    Back Cover
        Back Cover
Full Text

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Sec.412.Base of oll,'mesureen ules ma iu
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By the President of the United States of Amelica
WHEREAS section 411 of tide 2 of the Canal Zone Code,. 7
June 19, 1934, authorizes the President to prescribe and from time to-
time change the tolls that shall be levied by the Government of the
United States for the use of the Panama Canal, and provides that 00
tolls when so prescribed shall be changed anless six months' irti ce
thereof is given by the President byprociamation; and
WHEREAS section 412 of title 2 of the said Code requires the President
to determine the tonnage of vessels on which toll charges fourth um
of the Panama Canal shall be based, and fixes maximum and minimum,
rates of tolls; and
WHEREAS the act entitled "An Act -to provide for the measurenust
of vessels using the Panama Canal, and for other purposes," approveA
August 24, 1937, which amends the said section 412 and which by its
terms becomes effective March 1, 1938, provides, in part, that the
tonnage on which tolls shall be based shall be deterniked in accordartm
with the Rules for the Measurement of Vessels for the Panama Canal,
prescribed by the President, and fixes maximum and min'imum rates
of toll:
Now, T.HEREYoRE, I, FRANKLIN D. RoOsEvELT, President of the
United States of America, acting under and by virtue of the authority
vested in me by the aforesaid section 411 of title 2 of the Canal ZmAb-'
Code, approved June 19, 1934, do hereby prescribe and proclaim #*
following rates of toll to be paid by vessels using the Panatna Canal:
1. On merchant vessels, yachts, army and navy transports,
colliers, hospital ships, and supply ships, when carrying
passengers or" cargo, ninety (90) cents per net-vessel ton 6,f
100 cubic feet each of actu al earning capacity-that is, the
net tonnage determined in accordance with the Rules for the
.Measurement of Vessels for- the Panama Canal.
2. On vessels in ballast without passengers or camo,
seventy-two (72) cents per net-vesseI ton.
3 On other floating -craft, including warships; other than
transports, colliers, hospital ships, and supply shim: fifty
(50) cents per ton of displacement.
The tolls prescribed by this Proclamation shall becomie effective on
March 1, 1938, and on that date shall supersede the tolls prescribed
by. Proclamation. No. 1225 of November 13,1911.,
'As amended by Pkeebmation No. 2749, Augift 31. 1"7. wNch riboUtuted w "Ce"for "a"".

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Vessels transition the Panama Canal'f6r the sole purpose of haviog
repairs made at the Panama Canal,'dtydoeks and shops, are'exempted
fron i the payment of tolls by virtue, of the following provision'd thil
Exe C-utive Order of Novembet 17, 1921, which are applied to traiv
from either Cristobal or Balboa and return:
I. Vessels" transition' the Panama Canal from Cristobal to Balboa as4
return, for the sole purpose of having repairs made at the Balboa drydod,"lk *W
shops, will be exempt from the payment of tolls as prescribed in the Pro8a.
mation of the President of the United States dated November 0, 1914+'mibi
lieu thereof shall pay charges for pilotage, tow ge, -aad l9pIrAgoe for a
transit at rates based on cost as determined by. the-Governor of The Panamm
Canal from time to time..
2. Should a vessel, after ha,. ingjnade the transit from Cristobal to Batboa
under the above conditions, decide not to return to Cristobal, or should it
discharge or receive cargo, passengers, mail, or baggage at Balboa or accoa-
plish .anything else for which. vessels -wually transit the CAuW other than, to
have repiair's'made, tolls will be collected for the tranik 6m Cristobal to
BalbQa at the-, prescribed rates before such vessel will. be givext a clearsvice,
and allowed to proceed, the amount previously collected for loc age A164,
piloUge through the Canal being applied as part payment thereof.



By the President of the United States of America
WnEREAs section 412 of tide 2 of the Canal Zone Code approved
June 19, 1934, requires the President to determine the tonnage of
vemels upon which toll charges for the use of the Panama Canal shall
be basedf and
WHEREAS the act entitled "An Act to provide for the measurement
of vessels using the Panama Canal, and for other purposes," approved
Augus t 24, 1937, which amends the said section 412 and which by its
terms becomes effective March 1, 1938, provides, in part, that tolls on
merchant vessels, army and navy transports, colliers, hospital ships,
supply ships, and yachts, shall be based on net-vessel tons of 100
cubic feet each of actual earning capacity determined in accordance
with the Rules for the Measurement of Vessels for the Panama Canal
preactibed. by the President and as may be modified by him from time
to time by proclamation after public hearings and six months' public
Now, THEREFORE, 1, FR&NKLiN D. RoosEvELT, President of the
United States of America, acting under and by virture of the authority
vested 'in me by the aforesaid section 412 of title 2 of the Canal Zone
Code, approved June 19, 1934, do hereby prescribe and proclaim the
Rules for the Measurement of Vessels for the Panama Canal which are
annexed hereto and made a part of this proclamation.
The Rules for the Measurement of Vessels for the Panama Canal
prescribed by this proclamation shall become effective on March 1,
1938, and shall on that date supersede the Rules prescribed by
Proclamation No. 1258 of November 21, 1913.
IN WITNESS WHEREOF, I have hereunto set my hand and caused
the seal of the United States to be affixed.
DONE at the City of Washington this 25th day of August in the year
of our Lord nineteen hundred and thirty-seven and of the Inde-
pendence of the United States of America the one hundred and sixty-
By the President,
CoiwFj,.L H uLL,
Secretary of State.
[No. 22481


Effective March 1, 1938.
1. ARTICLE I. All vessels, American and foreign, except warshIm
floating drydocks, and dredges, including vessels of commerce M4
army and navy transports, colliers, supply ships, and, hospital ship
applying for passage through the Panama Canal shall present a d
authenticated certificate stating the vessel's gross and net toil'aake As
determined by these rules. Vessels- of commerce, army and navy,
transports, colliers, supply ships, and hospital ships without such etitiff-
cate shall, before passing through the Canal, or before being altowe4
to clear therefrom, be measured, and shall have their gross and net,
tonnage determined in accordance with these rules..
2. All warships, American and foreign, other than transportsi
c olliers, supply and hospital ships, shall present duly authenticated,
displacement scale and curves stating accurately the tonnage of
displacement at each possible mean draft.
3. It is to be understood that it SUPPL.y ships" shall include. army
and navy ammunition ships, refrigerator ships, distilling ships
repair ships and tenders, as well as army and navy vessels used to
transport general army and navy supplies; and that "colliers" shA
include army and navy vessels used to transport coal or fuel 04.
and that "warships" shall include armed coast guard vessels and vessel,*
devoted to naval training purposes.
Spaces to be Included in Gross Tonnage
4. ART. I I. Gross tonnage as determined by these rules "11
express the total capacity of vessels, i. e., the exact cubical contents
of all spaces below the upper deck and of all permanently covered and
closed-in spaces on or above that deck, excepting such spaces as may
be hereinafter permitted as exemptions from measurement. Gross
tonnage shall include not only all permanentlycovered and closed-in
spaces which are or may be used for stowing cargo and stores or for
providing shelter and other comfort for passengers: or v rew; but also,
such spaces as are used, or are intended to be used-,in ta V119ating and
serving the vessel.


5. Only such spaces as am specifically mentioned in article IV,
bekw, shall be exempted from measurement. All other spaces shall be
cmaklered as closed in and shall be included in gross tonnage.

Spwee Con4dend Permanently Covered and Clooed In
6. ART. 111. By permanently covered and closed-in spaces on or
above the upper deck are to be understood all those which are separated
off by decks or coverings, or fixed partitions, and which, therefore,
represent an increase of capacity that is or may be used for the stowage
of cargo, or fo.- the berthing and accommodation of the passengers,
the officers, or the crew. No break in a deck, nor any opening or
openings in a deck or the covering of a space or in the partitions or
walls of a space, nor the absence of a partition shall prevent a space
from being measured and comprised in gross tonnage if means are
provided for closing such a break, opening or openings, so that the
spaces thus closed in be thereby better fitted for the transport of goods
or passengers. The upper deck is the uppermost full length deck
extending from stem to stern.
7. In the case of a vessel having a "trunk" or "turret," the deck
forming the covering of the trunk or turret shall be considered the
upper deck, and all spaces below that deck within the trunk or turret
shall be considered as covered and closed in. The space within the
Wrret or trunk shall be measured as are other between-deck spaces.
8. Spaces considered as "permanently closed in" and spaces per-
witted to be exempted from measurement shall be determined solely
by the provisions contained in these rules, and not by any definitions
or provisions contained in the measurement rules or regulations of
any country.
Spam Rzempted from Measurement and Gron Tonnage
9. A&T. IV. The following spaces shall be exempted from measure-
ment and shall not be included in the gross tonnage, and no other
spaces shall be exempted:
10. SEcTioN 1. Spaces on or above the upper deck not permanendy
covered or closed in, or which may not be readily covered or closed in.
In the application of this rule it will be understood that-
(a) Spaces under decks or coverings having no other connection
with the body of the ship than the stanchions necessary for their
support are not spaces separated off, but are spaces permanently
to the weather and the sea and are not to be included in
the gross tonnage.


(b) A space within a poop, forecastle, bridge house, or, odw,
44permanently covered and closed-in" superstructure or erec",,_
may be considered as not permanently covered or closed in, ao4
may consequently be excluded from tonnage, if the space i*
opposite an end opening which is not provided wl meao
closing, and which opening has a breadth equal to or greater Omm,
half the breadth of the deck at the line of the opening, andiftho-
space opposite the opening cannot he used to shelter other n* -
chandise than cargo or stores that do not require protection, fm*
the sea. If the opening is fitted with acoaming, the space with$*
it is to be included in the gross tonnage if the, coamingis *wst,
than two feet in height. This provision shall be so applied ao to
exempt from measurement only the space between the actual eX4,
opening and a line drawn parallel to the line or face of the oped
at -a distance from the opening equal to one-half the width of tho,
deck at the line of the opening provided, that any closed-in spoo
between the open face and the 1i drawn parallel to it shall t4
measured. The remainder of the space within a poop, forecasdc *
bridge house, or other supe'rstructure or erection shall be can,6-
sidered as available for the accommodation of cargo or stores, of
passengers or of the ship's personnel, and shall be measured and
included in the gross tonnage. (See figs. 1, 2; and 3.)
Should the open space within a poop, forecastle, bridge housq,,
superstructure, or erection between the end opening and a paralW
line distant from the opening by half the breadth of the deck,
become, because of any arrangement, except by convergence'Ok,
fore and aft bulkheads, of less width than half the breadth of thi
deck, then only the space between the line of the end opening anA,
a parallel line drawn through the point where the athwartship
width of the open space within the poop, forecastle,: bridge house-,
superstructure, or erection becomes equal to, or less than, half the
breadth of the deck shall be exempted. from measurement. (See
figs. 4,-5, 6, and 7.) The remainder of the space within the pocqp ,
forecastle, bridge house, superstructure, or erection is to 1*
included in the gross tonnage.
When two erections extending from side.. to side of the ship are
separated by an interval the fore-and-aft length of which is lew
than the least half breadth of the deck in way of such intervatj
then whatever be the breadth of the permanent end openings
of the erections the entire erections., less the interval separating
them, shall be measured and induded in the gr6ss tonnage. (See
fig. 8.)


(c) In a poop, forecastle, side-to-side bridge house, or other
"permanently covered and closed-in" superstructure or side-to-
side erection the space directly in way of opposite openings, the
height of which is at least 3 feet, in the side wall of the ship not
provided with means of closing and corresponding to each other
in the op ite walls of the ship shall be exempted. (See figs. 9
and 10.) Passages running fore-and-aft abreast the engine-room
casing and open at both ends shall not be exempted. The deck
erection including same shall be considered a side-to-side erection
provided its outboard sides are flush with the hull of the vessel.
11. Szc. 2. Spaces in way of opposite side openings at least 3 feet
in height not provided with means of closing shall be exempted. In
the case of a continuous deck with one or more deck openings (usually
designated as tonnage openings) that may be so closed as to permit
cup or stores to be carried in the space under the deck, or under
portions thereof, only the spaces under such a deck that are exactly
in way of opposite openings at least 3 feet in he* ht in the side walls
of the ship not provided with means of closing and corresponding
to each other in the opposite walls of the ship shall be exempted; and
the remaining spaces under such a deck shall be measured and included
in grow tonnage. In case the openings in the side walls of the ship
are provided with means of closing no portion of the space under such
a'deck shall be exempted. (Fig. 11).
12. SEc. 3. The spaces framed in round the funnels and the spaces
Muired for the adnuission of light and air into the engine rooms shall
be exempted from measurement to the extent that such spaces are
aborve the deck or covering of the first or lowest tier of side-to-side
erections, if any, on the upper deckas defined in Art. III. A deck
with one or more deck openings (usually designated as tonnage open-
0 .. that may be so closed as to perviit cargo or stores to be carried
in the space under the deck or portions thereof wovld be considered as
the upper deck. There shall, however, be measured and included
within gross tonnage the spaces situated within closed-in side-to-side
erections on the upper deck, spaces framed in round the funnels and
those required for the admission of light and air to the extent that such
light and air and funnel spaces are below the deck or covering of
the first or lowest tier of such side-to-side erections on the upper
deck. There shall be exempted from the measurement of any super-
structure or erection situated above the first or lowest tier of side-to-
" erections on the upper deck such portion or portions thereof as
are occupied by the spaces framed in round the funnels or by the spaces
required for the admission of light and air 'into the engine rooms.

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deducted one-half of 1 percent of the vessel's gross tonnage, exclusive
of batchways, and only the remainder shall be added to the gross
tonnage of the ship, exlusive of the tonnage of the hatchways.
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Class 2: Ships of which the tonnagedeck is, acording to theabootl#
measurement, above SO: feet long a-nd not exceeding 120 fbet, inta-likr-,
equal parts.
Class 3: Ships of which the tonnage deck is, accordirig to, tht, A-161MMOVIR11' J'
measurement, above 120 feet long and not exceeding 1,80Jftt,,A*
eight equal parts.
Class 4: Ships of which the tonnage deck is, according to ff aho io_ I
measurement, above 180 feet long and not exceeding 22$ faet iato -
10 equal parts.
Class 5: Ships of which the tonnage deck according to th"".
measurement, above 225 feet long, intib 12 equal parts.
greater number of divisions is permiAsible provided there be a;t
number of divisions.)
25. In the case of a break or breaks in a double bottow, thell
of the vessel is to be taken in partsaccording to the number of
and each part divided into a number of equal parts according to
class in the above table to which suchjength belongs.
26. Sipc. 2. Then the hold being first sufficiently cleared to, admicei
the required depths and breaths being properly taken, find the tranlj,,
verse area of the ship at each point of division' of, the kngth 4or-
point of division'-of the parts of the length, as the case may,"tfite 96
follows: Measure the depth at each point of division, from a POW at 41
distance of one-third of the round of the beam below the tonnage deck,
o in the case of a break, below a line stret hed in continuation there4,
to the upper side of the floor timber (upper side of the inner plating of
the double bottom) at ihe inside of the 11mber strake, after deducting,,,
the average thickness of the ceiling which is between the bilge ptanl
and the limber strake.
27. In the case of a vessel constructed with longitudinal framing,
the depths are to be taken to the upper edge or inner surface of the
longitudinal frames, where no double bottoms exist, Inthe, case &-a
ship constructed with a double bottom, the depth s hall be talmn td the,
upper side of the inner plating of the. double bottom, asid that upper
side shall, for the purposes of measurement be deemed to repreamt
the floor timber of the vessel. Thi's rule for m easuring the depth of tb*
hold applies to double-bottom ships having top of double bottom not
horizontal. Subject to the provisions of -article IV, section 4 of these I
rules regarding the exemption of double-bottom spaces,, if any tankor
compartment between the inner and outer plating of the double bottam
is used or fitted for the carryingof cargo, the tonnage of the whole odf
such tank or compartment shalt be determined and, included in the
gross tonnage of -the vessel.


X If the depth at the midship division of the length does not
exceed 16 feet, divide each depth into five equal parts; then measure
the inside horizontal breadth at each of the four points of division,
and also at the upper int of the depth, extending each measurement
to the average thickness in that part of the ceiling which is between
the points of measurement. Number these breaths from above (i. e.,
mimbering the upper breadth 1, and so on down to the fifth breadth);
multiply the second and fourth by 4, and the third by 2 ; add these
products together, and to the sum add the first breadth and the fifth.
Multiply the quantity thus obtained by one-third of the common
interval between the breaths, and the product shall be deemed the
anxvww area of the upper part of the section; then find the area
between the fifth and lower point of the depth by dividing the depth
between such points into four equal parts, and measure the horizontal
bnadthe at the three points of division and also at the upper and
lower points, and proceed as before, and the sum of two parts shall be
deemed to be the transverse area-, but if the midship depth exceed
16 feet, divide each depth into seven equal parts instead of five, and
measure, as before directed, the horizontal breaths at the six points
of divisw*n, and also at the upper point of the depth; number them from
above, as before; multiply the second, fourth, and sixth by 4, and the
third and fifth by 2; add these products together, and to the sum add
the first breadth and the seventh. Multiply the quantity thus
obtained by one-third of the common interval between the breaths,
and the product shall be deemed to be the transverse area of the upper
part of the section; then find the lower part of the area as before
directed, and add the two parts together, and the sum shall be deemed
to be the transverse area.
29. This section applies to vessels with double bottoms, the tops of
which have a rise from the middle line to each side. In vessels in which
the top:of the double bottom is horizontal, or in which there is no
double bottom, the depths are to be divided by 4 or 6 (instead of 5
or 7),, according to their midship. depths do not or do exceed 16 feet
vely. In such cases no subdivision of the lower part is to be
30. In the case of ships built on the Isherwood system the depths
am to be taken to the upper edge of the longitudinal frames, where no
double bottom e3dsts. In vessels built of concrete the depths and
W*sdthe sW be taken to the inner edge of the main frames. It is to
be myted that section 2. paragraph 29, provides that in vessels without
4ouble bottoms no subdivision of the lower part of the transverse area
in to be made. On ships built with transverse frames without double


bottoms the depths are to be taken to the top of the transveme fraa*,F,
and no subdivision of the lower section is necessary.
31. SEc. 3. Number the transverse sections or areas respoctiv*
1, 2, 3, etc., No. I being at the extreme limit of the length at the bo%
or of each part of the length, and the last number at the extwow., V4
limit of the length at the stem or the'extreme limit at the after emi,
of each part of the length; then, whether the length be divided accardiPS
to the table into 4 or 12 parts, as in classes I and 5, or any intermedja *
number, as in classes 2, 3, and 4, mx lti ly the second andevery ev"7
numbered area by 4, and the third and every odd-numbered a"-*
(except the first and last) by 2; add these products:together,:and,*W**
sum add the first and last, if they yield anything-. mtdtiplytk*
quantity thus obtained by one-third of the common interval betwted
the areas, and the product will be the cubical contents of the spot*
or cubical contents of each part if the ship is measured in parts uader
the tonnage deck. The tonnage of this volume is obtained by dividi"g
it by 100, if the measurements are taken in English feet, and by 2.83
if the measurements are taken in meters. The multiplier 0.353 may
be used instead of the divisor 2.83.
32. SF-c. 4. If the ship has a third Aeck the -tonnage of the spact
between it and the tonnage deck shall be ascertained as follows.:
Measure in feet the inside length of the space at the middle of its beight
from the plank at the side of the stem to the lining on the timbers at
the stem, and divide the length into thesame number of equal p"
into which the length of the tonnage deck is divided, as above directed;
measure (also at the middle of its height) the. 'inside breadth of
space at each of the points of division, also the breadth at the stem alva-
the breadth at the stern; number them successively 1. 2, 3, etc., cniw,
mencing at the stem; multiply the second and all the other even-num-
bered breaths by 4, and the third and all the other: odd-numbemd
breaths (except the first and last) by 2; to the sum:of these products
add the first and last breaths; multiply the whole sum by one-third
of the common interval between the bread" and the result will give
in superficial feet the mean horizontal area of the space; measure
the mean height of the space, and multiply by it the mean horizontal
area, and the product will be the cubical contents oUthe space; divide
this product by 100 (or by 2.83 if the measurements are taken i'a
meters) and the quotient shall be deemed to be the tontiage of the
space, and shall be added to the tonnage of the-Ship ascertained as
aforesaid; and if the ship has more than three deck&, the tonnage of
each space between decks above the tonnage deck shall be severally


in the manner above described, and shall be added to the
tonnage of the ship ascertained as aforesaid.
33. Sac. 5. If there be a break, a poop, or any other permanently
omm-ed or closed-in space on or above the upper deck (as defined above
in wdele 111) the tonnage of such space shall be ascertained as follows:
Mewwre the internal mean length of the space in feet, and divide it
into two equal parts-, measure at the middle of its height three inside
bendths, namely, one at each end and the other at the middle of the
length; then to the sum of the end breaths add four times the middle
bnodth, and multiply the whole sum by. one-third of the common
interval between the breaths; the product will give the mean hori-
metal area of the space; then measure the mean height and multiply
by it the mean horizontal area; divide the product by 100 (or by 2.83
if the measurements are taken in meters) and the quotient shall be
daemed to be the tonnage of the space.
34, Szc. 6. In measuring the length, breadth, and height of the
general volume of the ship or that of the other spaces, reduce to the
nmn thickness. the parts of the ceiling which exceed the mean thick-
now When the ceiling is absent, or when it is not premanently fixed,
the length and breadth shall be reckoned from the main frames of the
shipt not from the web or belt frames. The same principle is to hold
in the case of deck erections; that is, the breadth is to be reckoned
fmw the main framing or stiffeners of the same, when ceiling is not
fitted. When the main framing of the ship is curved or carried up-
wod and 'inboard so as to permit the building of top-side tanks or
nts outboard of the main framing, the breadth of the ship
"ll be reckoned from the outboard framing of such outboard tanks,
thus including these tanks in the measurement.
RuLz II. Foit Mj&AsuRj[N(; THE Gitoss TONNAGE
t 3S. Suc. 7. When ships have cargo on board, or when for any other
tftson their tonnage cannot be ascertained by means of rule 1, proceed
ia the follinving manner:
36. Measure the length on the uppermost full-length deck from the
mtside of the outer plank at the stem to the aft side of the sternpost,
--1- 1 - i therefrom the distance between the aft side of the sternpost
and the rabbet of the sternpost at the point where the counterplank
coeses it. Measure also the greatest breadth of the ship to the outside
of the outer planking or wales at the middle perpendicular. Then,
having fimt nuwked on the outside of the ship on both sides thereof the
height of the uppermost fuH-Wngth deck at the ship's sides, girt the

24iiiiiiiiiii THE PANAMAi CANALiiiiiiiiiiiiiiiiiiiiiiiiii
shiiip athiddepredcuainadreto epndclrt h
keel from the heiiiiii~iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii i ght so marked on the outside of the ship, on the onei~ii~i~i
ide, to the he~iiiiiiiiiii~~iiiiii~ii~iiiiiiiiiiii~~ii i ght so marked on the other side, by passing a chain underii~ii.................
t iiiih e ohal hegrh hs ae adhlfte anbrat .......m
thn umlil h eutb h egho h hp-ae saoe

............ thn m lilnhspoutb tefco .7i h aeo
sh ip ilt, ofwoadbh atr018i h aeo hpul
of i o r s e l h r d c il g v p r x m t l h a i a
contents...... ofte hp adth onaeca easetandbydviii
by....... 10 rb .3 codn stemaueet r ae nEgi
feto n ees
37. SEC. 8. If thre be a break, apoop, or othet permanent covere
an lse-nspcs(a eindaov naril II n raov h
uppemos ful-legthdeck th tonageof uch pacs sall e acer
ine b mltplin tgehe temen nsdelegt, redt, n
det fsuhsaesaddviigte rdc b 0,or28,acodn
asth eaurmnt aetaeni Egls feto mtes ad nh

oien o bane hllb dee t eth onaeoftespcs

andishalli dde totheothr tnnaeiinordritideermneihe ros
tonageor ota cpacty f te sip
38 E.9 nacrann h tnaeo pnsis h pe

edeo|h pe taeo h hl ltn st omtebudr
lieo|esrmnadtedphssalb ae rma twr,


spece in'cluded in gross tonnage the sum of the cubical contents of the
spaces whose deduction from grow tonnage is permitted by thew
ndes, shall be the Panama Canal net tonnage of vessels upon which
tdk and other charges based upon net tonnage shall be paid by vessels
of commerce, army and navy transports, colliers, supply ships, and
bospital ships (as defined in art. 1) for passage through the Panama
CmW. One hundred cubic feet, or 2.83 cubic meters, shall constitute
am gross or net ton.
41. Spaces for the use, or possible use, of passengers (as defined in
art VI) shall not be deducted from the gross tonnage, except in so far
as their deduction may be specifically provided for in the following
sections (I to 11) of this article of these rules.
Definition of Stores and Cafto Carried on Army and Navy Transports,,
Collins. Supply Ships, and Hospital Ships
42. Spaces available for the stowage of stores (other than boat-
wain's stores) or cargo shall not be deducted from gross tonnage.
In ca of army and navy transports, colliers, supply ships, and hos-
pital ships, as defined in article I, the term "stores (other than boat-
wrain's stores) or cargo" shall include, in addition to goods or cargo
ordinarily carried as freight on vessels of commerce, the following
(a) On transports, food, stores, luggage, accouterments and
equipment for passengers.
(b) On colliers, coal, coaling gear, and fuel oil not for the use
of the colliers.
(c) On supply ships, stores, supplies of all kinds, distilling
machinery and distilled water (other than fresh water stored in
peak tanks for the vessel's own use), machines, tools and material
for repair work, mines and mining material, torpedoes, arms, and
(d) On hospiital ships, food stores for passengers, medical stores,
and hospital equipment.
(e) Guns mounted on transports and supply ships, for defense
of the ships, and ammunition required for use in such guns shall
not be classed as cargo.
Deductions ft Grow Tonnfte Allow" Vessels in Deterrainift
Not Tonnage
43. SRmoN I The tonnage of the spaces or compartments
occupied by, or appropriated to the use of, the officers and crew of the
vewl shall be deducted. The term "officers and crew" shall include
the Personnel insm*bed on the ship's rolls, i. e., the ship's officers,


engineers, doctors, apothecaryj: sick attendants, swWr4,
firemen, mechanics, and wireless operators including, clarlca pvOWW
stewards and other members of the personnel provided by the shjp# W
the care of the passengers as well asormed guards on vessel& o -r$00K
merce. The spaces or compartments occupied by the offibmw w*
crew shall include their berthing accounnodations, spaces pooy*'",
for medical attention, including the medicine locker anddispeAspg$
mess rooms, ward and dressing rooms, bath and washroonw* imoo
closets, latrines, lavatories or priviE;; for thgir exclusive, uftA&A
passageways designed primarily for serving 1hese spaces,.
provided for a pilot and so designated, shall be deducted, but
rooms and linen lockers are not to be deducted.
44. SEC. 2. On hospital ships the spaces or compartments -J
by doctors, apothecary, and sick attendants duty in
ship's rolls, shall form pa rt of the'deduction under section 1. of tb*
article. Spaces provided for the medical attention of theoffidif*i64,
crew of a hospital ship shall likewise b6 deducted; but spaces fitte&Wr,,
the transportation, or for the medical attention, of other persom-A
those duly listed *in the ship's rolls sh all not be deducted.
45. SEC. 3. The spaces app riated to the use of the masterkA
be deducted. ropn
46. SEC. 4. Cook houses, galleys, bakeriM laundries, and rooms fi*
ice machines, when used exclusively to serve the officers and crew, sW
the condenser space, and distilling roonisvwhen used exclusively fer
condensing and distilling the water for the officers and crew, shall be
deducted. %
47. SEC. 5. Spaces used for anchor gear, including the chain locker-
steering gear; capstan; the wheel house; the dynamo; the chart room
used exclusively for keeping charts, signals, and other instrummito Of
navigation; offices for the master, chief officer, and chief engkeer;
lookout houses; spaces for keeping electric searchlights, radio Appri-
ances, and wireless telephone apparatus; carpenter shop; funiigati;V
and fire-fighting machinery; and other spaces actually usied ift t1w 11%t
navigation of the ship, shall be deducted. Such spaces upon vowoU. j-
of commerce as may be devoted to the mounting of guns and to the X II,
stowage of ammunition for theguns thus mounted shall be dedt*W,. I
The deduction of all spaces, enumerated mi this section#. awt bw
reaspnable in extent and be....subject: to the himitations stipulawd
below in Article XI.
48. SEc. 6. In case of a ship propelled wholly by sails, any space,
not exceeding 21/2 percent of the gross tonxWe, u*ed elm", ve, ly for
storage of sails shall be deducted.


49. Szc. 7. Spaces used exclusively for boatswain's stores, including
Pint and lamp rooms, shall be deducted. The deduction is not,
however,, to exceed 1 percent of the gross tonnage in ships of 1,000
tons gross and upwards, nor more than 75 tons in any ship however
kw. In vessels from 500 to 1,000 tons gross the limit is fixed at
10 tons and in vessels from 150 to 500 tons at not more than 2 percent
of the grow tonnage. In vessels under 150 tons at not more than
3 tono.
SO. Spaces used exclusively for engineer's shops shall be deducted.
Ilik deduction is in no case to exceed S percent of the actual propelling
ma inery space nor be more than 50 tons for any vessel.
$1. Suc. 8. The space occupied by donkey engine and boiler shall
be deducted even though not connected with the main pumps of the
ship. The space occupied by the pumps used exclusively for handling
food water, ballast, bunker fuel, or for freeing the ship of water shall
also be deducted, but the space occupied by the pumps used for han-
cargo shall not be deducted.
$2. Szc. 9. Passages and passageways designed primarily for serving
deducted spaces shall be deducted.
, 53. Sac. 10. Water ballast spaces, other than spaces in the vessel's
double bottom, shall be deducted if they are adapted only for water
Waist, have for entrance only ordinary circular or oval manholes
whose greatest diameter does not exceed 30 inches, and are not avail-
&We for the carriage of cargo, stores, or fuel. Peak tanks shall also be
deducted when adapted only for carrying fresh water for the vessel's
own use.. can be entered only as above stated, and are not available
for the carriage of cargo or fuel. If used to carry oil or other fuel
these spaces shall be regarded as part of the vessel's fuel space and
Wmff not be subject to separate deduction.
Tonnage of tanks may be obtained by using liquid capacity times
the conversion factor with one-sixth off for frames in case of peak tanks
and one-twelfth off in case of wings or deep tanks when they cannot
be readily measured.
S4. SEC. 11. Spaces appropriated tD the use of the passengers solely
publIc rooms WWI be deducted. Tlhese shall include such spaces as
social halk, smoking room, music rmns, libraries, lounges, dining
*&loons, gymnasiums, children's playroorrm elevators, foyers, prome-
nades, vemnda. cafes, barrooms, barber shops, novelty shops, and
Passageways deAmed primarily for serving such spaces. Water-
Closets, toilets, lavaWria and washrooms dedgmed primarily to serve
Public vaces will be coaWdered an part of the public spaces and be
deducted y. Water-tiosets, toilets, lavatories, baths and

28iiiiiiii~i~iiii THE P NAMAiiiAL
washroomsiiiiiii deindpimrl osev ery ttronsi h m
ieriiiiii will ecniee spr ftesaeo m hysre n o
subjectiiiiiiiiiiiiiii to....ton

Naioa Law
55. RT.XI.Eac ofthe pacs eumeate in rtile sctin
Iiti 1,inlssoterisisecfialystte, hal e ubecit sc
codition n eurmet st akigo eintinadueo
countriiesiu osae te hnfelsae eutdudratce
I I Iiiiiiiiiiishl"b euce u lssteus o hc i sob

ri ng. Inioicseihoeveisalianarbtray axiumiimiib
ixeititeagreat edctonmdeuneratile

(BiddtoalDdctosAloeifrVesliPoele yEnie
56 RT I. h anm anlneionaeuonwih ol
ani tercageiaeiuoionaeshliepadb vses fcm
merceii ar yan..y.rnpotcoless..ysisadho.a
ipsiii, asdfndiril ,poeld yegns o asg hog
theiiiii PaaaCnl halb h ongermiigate h olwn
deduction haebe aefo h rostnae n ude
cicfeetior 2.3 cubi meter, shal constttife ne gros or nt ton
Vessels ..................... partl by. sal an.... y e gne h l b lse
asiiiiiiiiiiii =i==N iiii== "vessels p opeiiiibiiiiines.
Addiiiiiiiiiiii tiona Dedcton frmGrsiTnag lowdVeslsPople



by the donkey engine and boiler when situated within the boundary
at the engine room or within the light and air casing above the engine
aa and when used in connection with the main machinery for propel-
ling the vessel, shall be deducted. When the shafts of screw propellers
pm through open spaces not enclosed within tunnels, the spaces
*Ikmved in lieu of the tunnels must be of reasonable dimensions suit-
We for the vessel in question. When any portion of the engine or
Wer rooms is occupied by a tank for fresh water, the spaces thus
ta up shall not be deducted.
59. Donkey-tsigine and boiler spaces, when deducted according to
article XIV below, shall not be made a separate deduction.
60. Tbe portion of the framed-in spaces around the funnels and of
the fight and air casings that extend above the deck or covering of the
fim or lowest tier of side-to-side erections, if any, on the upper deck,
an Aefined *in article IV, section 3, and surrounding the said space or
4xim are exempted from measurement and form no part of the space
deducted under this section.
61. Sm S. The deductions made for propelling power, including
all those provided for in section 2 of this article, shall in no case exceed
30 percent of the gross tonnage. In other respects the spaces enumer-
med M* section 2 shall, except as otherwise specifically stated, be sub-
Ject to the requirements as to designation or marking and use or pur-
pow contained in the navigation or regiistry laws of the several
62. Sm 4. The deductions made for propelling power provided for
In section 2 of this article shall be made according to the provisions of
article XIII or of article XIV, as the owner of the vessel may elect.
63. Sw. S. (This section was eliminated by recommendation of
Special Comnuittee on Panama Canal Tolls and Vessel Measurement
04 Paweir Deducom for Yewele with Bunkme HAving Movable
Partitions, or Havift Fu*1-011 Comparments that may be uad to
Stow Quile or Stores.
". AitT. XIII. In ships that do not have fixed bunkers, but trans-
vew bunimrs with movable partitions, with or without lateral bunkers,
and in ships with fuel tanks which may be used to stow cargo or stores,
meswum the space occupied by the engine rooms, and add to it for
vessels with screw propellers 75 percent and for vessels with paddle
wheels 50 percent of such space.
65. By the %xwe occupied by the engine rooms *18 to be understood
tMt occupied. by the engim room itseff and the boiler room, together


with the spaces strictly required for the working of the
boilers, with theaddition -of the spaces taken up bytheah*W,1--%"^W-"WANM
in vessels with screw propellers, the spaces: which endosethe-641
and the casings necessary for the:.Adnuiss" of -light and airio#o Ift,
engine room to the extent that such spaces are located, below
deck (as defined in article III) or below a deck with opeaings -
designated as tonnage openings, which may be so dosed as ta
the carriage of cargo or stores under-the deck or a portion,
and donkey-engine and boiler spaces when the donkey
boiler are situated within the boundary:of the maiumgine rooo,
the light and air c asing above it and when they are used mi
with the main machinery for propellii g the vessel. When the-'
of screw propellers pass through open spaces not enclosed wi
nels, the spaces allowed in lieu of tunnels must be of rftspo"'
dimensions suitable for the vessel in question. When a portion, t4,
space within the boundary of -the engine or: boiler rooms is ooft*k.0
by a tank or tanks for the storage of fuel oill lubricating oil, arho'"
water, the space considered to be within the' engine room AWI, bo
reduced by the space taken up by the tank or tanks for fuel oU,,h**
cating oil, or fresh water. Note that fuel-oil settling tanks am q*
to be included in the propelling-powerspace, no matter where si
Storerooms, dynamos, ice mac:hine, etc-, situated in the cmfivm 0(
the engine room and not bulkheaded off, pay he included in enjOomr
room space. If bulkheaded off, they shalt not be included in em+w
room space but be given separate deductions wheA they qualify undgt
article X and then listed under item 5on page 2 of the Panama tcal"41--
66. The cubical contents of the above-named spam occupied, by
engine room shall be ascertained mi the following: tnaamr: Mtoxs*
the mean depth of the space occupied by the engmies and beilom bo*
its crown to the ceiling at the limber strake; measure also thtm, te,
if necessary, more than three, breaths of the spaco- at the
of its depth, taking one of such measurements at each end and an 6er
at the middle of the length; take the mean of suchbreadths; meiaw*
also the mean length of the space. between the foremost and afterowt
bulkheads or limits of its length, excluding such parts, if any, as we
not actually occupied by, or required* for, the proper workift of AW
engines and boilers. Multiply:. together these three dimeneims of
length, breadth, and depth, and the product will be, the cabical coo,*
tents of the space below the crown. Then, by mtdtiplyiag Ugether
the length, breadth, and depth, find the cubical conteats, of the space
or spaces, if any, which are framed in for machinery, for aklosing the


funnels, or for the admission of I" ht and air, and which are located
between the crown of the engine room and the uppermost deck or
covedng of the first or lowest tier of side-to-side erections, if any, on
*e upper deck, as defined in article 111. Add such contents, as well
as thaw of the space occupied by the shaft trunk and by any donkey
engine and boiler located within the boundary of the engine room or
of the light and Or casing above the engine room and used in connection
with the mgu*n machinery for propelling the ship, to the cubical con-
Unto of the space below the crown of the engine room; divide the sum
by 100 or by 2.93, according as the measurements are taken in feet or
=eftm and the result shall be deemed to be the tonnage of the engine
and boiler room and shall be the tonnage taken as the basis for calcu-
lafumg the deduction for propelling power.
67. If in any ship in which the space for propelling power is to be
the engines and boilers are in separate compartments, the
intents of each compartment shall be measured separately in like
tuanner, according to the above method; and the sum of the tonnage
of thespaces included in the several compartments shall be deemed
to be the tonnage of the engine and boiler rooms, and shall be the
tonnage taken as the basis for calculating the deduction for propelling

ftopefte Power Deduction for Vemis with Fixed Bunkers, or havft Fuel-
on Compartments that cannot be used to Stow Cafto or Storm
68. A&T. XIV. When vessels are fitted with fixed coal bunkers or
with fuel-oil taWw which cannot be used to stow cargo or stores, and
when such bunkers, tanks, and fuel compartments have been certified
by official marking to be spaces for the vessel's fuel, the deduction for
Vvpelft power may either be in accordance with the provisions of
artkk XIII abow, or by deducting the actual tonnage of the spaces
in article XII, section 2, as measured i accordance with
the foHowing provisions, as the owner of the vessel may elect: Measure
the mean length of the engim and boiler room, including the coal
bunkem Ascertain the area of three transverse sections of the ship
(as set forth in the rules given 'in articles VIII or IX for the calculation
of the gross tonnage) to the deck which covers the engine. One of
these three sections must pass through the middle of the aforesaid
length, and the two others through the two extremities. Add to the
eum of the two extreme sections four times the middle one, and
multiply the sum thus obtained by the third of the distance between
the seeflons. Mda product, divided by 100 if the measurements are
takm mi English feet, or by 2.83 it they are taken in meters, gives the

to n n ag e o f the....p a ce ................................................e rs
areiiniiiparateiiiipartmentsiieasureieachicompartment, as== above
setiiiiiiiiiii ~ i fo r th,= a n a dd..........t....................................s
Thi unesiesueifrfulddutonsalincueinyihs
bun er tha ......... ab outl ............. fr m w ih t e o lc n b
trimme 'directli h ineromir toehle ad nt wic

an rmdos pnn no h nieromoitkhoe hat

shpbnesta a ei n a etne r o ob nlddi

th esrmnsfrddcin. hnayprino h nie


kW or stores other than boatswain's stores, or to provide passenger
accommodations, shall be evidence that the entire space thus wholly
or partially occupied is a part of the actual earning capacity of the
Wp, and the entire space shall be added to, and become a part of,
the net tonnage upon which Panama Canal tolls shall be collected.
Officials Authorixed to Measure Vesseh and Issue Certificates
73. A.RT. XV1. Only such officials as are authorized in the several
foreign countries and in the United States to measure vessels and to
9 tonnage certificates for purposes of national registry, and such
other officials as are authorized by the President of the United States,
or by those acting for him, to measure vessels and to issue Panama
Canal tonnage certificates, shall have authority to measure vessels for
Panama navigation or to issue Panama tonnage certificates.
Vonnage Certificates Issued under these Rules may be Corrected by
Officials at the Panama Canal
74. ART. XVIL Tonnage certificates presented at the Panama
Canal shall be subject to correction by the official or officials authorized
by the President of the United States, or by those acting for him, to
administer these measurement rules, in so far as may be necessary to
make the certificates conform to these rules.
Panama Canal Tonnage Certificates
75. ART. XV111. The Panama Canal tonnage certificates issued by
the measurement authorities of the United States and the several
foreign countries shall correspond in substance and form to the sample
certificate' appended to these rules. Blank certificates in English will
be fumislied by the Secretary of War or the Governor of The Panama
Canal upon request of the measurement authorities of foreign countries.
The measurement authorities of any foreign country may also provide
themselves with Panama Canal measurement certificates printed in
English or in the language of the foreign country, provided such certifi-
cates strictly correspond in substance and form to the sample certifi-
cate appended to these rules; and provided further, that if it is desired
to have a certificate in the language of the foreign country, there must
also be a corresponding certificate issued to the vessel in English.


upon Arriva aCnl

76iR.iiiiitllo ashpohr hnamyadnv
tra(( nsotclirsplshpadhsiashpsalbbae
uponiiiiii lc me i a pi
c at''!! i o................................ ................... ..........................
o~iiiii n sc ol ulol trs rsple smyb ucae n
tae nbadatraria tteCnlfrtrni hog h ae
"Warships" Deie
77 R.X."asips ntemaigo rilsX t
XIViiiiiiii shl ecniee ob l esl fwr te hnam
and navy........ trnprs oles optl hpad spl hpa
deie mnatce1 asisae esl fgvrmn wesi
thati ii ar..................e s or miiar o n v l ur os s
78.iiiiRT.iiiiiiiiiiiiiiiiiiiiiiiiiiiiiii thiiiiaimiiiindin avyiiitrans-
pots colesmupysis n optlsis(sdfndi r.I
uponiiiiiiii apligfrpsae hog h aa aCaa hli re
toifacilitaeteacranetoit endat eacoe rpae
at.... suc sttinorlcain.sshl...dsgntd.yth.ovroro

Commnde ofec asipt xii Vse' iplcmn cl

79.iiii AR.XI h omne f vr asiohrta
arm an aytasotclirspl hpadhsia hp
iii(a dein e N inir.1,apligfrisgPhruhtePaa aC nl


AMal ant to be Deternilned,, and to be Zxpmmed In Tons
of 2,W pounds
80. ART. XXIII. The actual displacement of warships shall be
dewniined from their official displacement scales and curves, and shall
be --- in tons of 2,240 pounds.
Should the displacement scale and curves of a warship show or
swe the vessel's displacement tonnage in metric tons of 2,204.62
pounds, the tonnage so expressed shall be multiplied by 0.9842 for the
purpose of converting the tonnage into tons of 2,240 pounds.

Rate for Deterntinift Displacement of a Warship not Supplied with
Displacement Scale and Curves
81. AXT. XXIV- Should any warship, other than army and navy
transports, colliers, supply ships, and hospital ships (as defined in
art. 1), apply for passage through the Panama Canal and, for reasons
satisfactory to the Governor of The Panama Canal, not have on board
the duly certified document or documents specified in article XXII,
the Governor of The Panama Canal, or the officials authorized to act
for him, shall then determine the displacement of the vessel, using
such reliable data as may be available, or by taking such dimensions
of the vessel and using such approximate methods as may be considered
necessary and practicable. The displacement tonnage so determined
shall be considered to be the displacement of the vessel.

Application and Interpretation of Rules
82. MT. XXV. The Board of Admeasurement of The Panama
Canal is charged with the application of these rules and, subject to the
approval of the Governor, all questions of interpretation arising there-
under..shall be decided by the Board. In applying the rules the Board
will be governed by the principle that there shall be no change in the
present treatment of spaces except as herein provided, and with the
approval of the Governor may provide for the treatment of any space
for which provision has not herein been made.




The following notes outline the essential differences between
rules for measurement, effective March 1, 1938, and the forme.,r "k*k
proclaimed November 21, 1913. 'the explanations, with qg ,
interpretative remarks, are issued for the assistance and guidaot*
officials concerned with the admeasurement of vessels for
Canal tonnage.
Paragraph numbers below correspond with those in the R
Measurement to which the notes refer:
Paragraph 1. Floating drydocks and dredges, without propelling pow
charged on displacement tonnage. The weight,4# such floating equipment is 4*0 04
to represent earning capacity more nearly than does the cubic content.
Paragraph 3. Armed coast guard vessels and vessels devoted to naval troi**g
purposes are considered as "Warships" an subject to the toll rate on displater
tonnage. However, such vessels must be devoted exclusively to the purpowsa**n,0,,.,-
Paragraph 10 (b). "X coarning not more than 2 feet in height may be ftttJt,*
the end opening of a superstructure described in Article IVsection 1 (4) and M'
the usual head plate above such a coarning will be permitted.
Paragraph 13. Double-bottom space are not 0 be included in grow to*,** 00
except when used, designated or intended for cargo. This refers to double bottoj*s
of ordinary depth built on the common cellular principle where the floor timbo*
extend the full depth of the space; but not deep tanks, wing or tunnel tanks wkh
built-up, structural-type floor timbers. Such parts of deep, wing and tunnel ta,*ks
above the ordinary floor timbers as are not included by the process of uadffirt
tonnage-deck measurement shall be included in the gross tonnage and may be deduc
if qualified under Article X, Section 10; but the parts below the ordinary #0M,
timbers, if used for cargo, shall be included in the gross as double-bottom tankiL
Paragraph 15. The term "companionway" is omitted as being synonymous v0
"stairway" which is the portion of an access to a- deck below a companion houge.' A
companion house is limited to the tier above the stairway it protects. Stairft"'AZO,
to be treated the same as the passageways or rooms they seirve. Elevator 9L-40
not considered as companion houses.
Paragraph 16.--Air shafts for ventilation purposes are cansidered in the as
category as domes and skylights. For practical purposes, when such vents are onwA
and difficult to trace in the process of measurement, they may be ignored as ex-
emptions and if in deductible spaces, included therein.
Paragraph 17. Exempted spaces enumerated in Article IV Section I (c) and
Section 2 are not subject to the penalties previously imposed when cargo is carried
therein (see paragraph 20).'
Paragraph 20. Tolle previously assessible on cargo stowed on open decks de-
scribed in the former Article VII are now eliminated.

Paash2.AtceM Scin2i ehae t rvd o etsiiii
bwitdialfrme vesl;as ocnomwt terqieeto ril V
section..... 4,,,,,,=== H with respectto exem tion ofdouble-ottom saces no for cago (se
Paramph 0. his s a pecal povison or vssel bult o theIshrwoo, o
lintuilfam yseoro cnree adprvds htude hecnitin

amfionedtherein no.s.bdvisi.n.f.the.loest.secion.i. ncessary
Phamp 3.Schsacsasfreatls oos bige r obiaiosthro
a( mre hanordnar lenth re o b sudivied nd easredi ao manne tha

will~ ~ ~ ~ ~ ~ ~~~~~~~~~... Mild i rw ong tereniecbia onetasrqiedb argah
4 n 7.I gnrlteprvson fpaarah3 aent emd cuat o

supovtructures~~~~~.......... moeta 0fe nlnt n ute udvsosaecn ideredi
Poramph43.Provsio ismadeforthededutio ofaccomodtios fr
per nne incried o th shp'sroll, rgarles of ervce erfrmed whthe fo
*Ap r psseners A oom et sideexcusiely or pilt i deuctile;als

-1 jmffl


Paragraph 53. Spaces "adapted for water ballast" am those =nnected otdy, *ith
a bona fide ballast system comprised of ballast pump and pipe lines for intakeo"
discharge, and with access only through the deck or cover by circuUr or ovd
manholes not more than 30 inches in greatest diameter. If the manhole is set 110,44t
plate or hatch cover such cover must be riveted to the tank top. Peak tanks w*
deductible as part of the water ballast system when adapted exclusively for w4er,
ballast. They are also deductible when adapted for fresh water for the ship',& we
and similarly fitted with manholes. The use of any other tank (except do",
bottom compartments) for fresh water would disqualify it for deduction.
Paragraph 54. On the basis that such spaces of themselves possess no dirva
earning capacity, public rooms designed solely for the use of passengers are allowtO,
as deductions. However, no space shall be deducted as a public room oa a "
passenger vessel as defined in paragraph 46 herein. A d-ining saloon on a pa4wtWr
ship will not be disqualified as a public rooih when used by the ship's persomW;
provided there are other mess rooms designated for and sufficient to doconkmodkte
such personnel.
Paragraph 61. Tugs are no longer exceptions to the propelling poorer limitation
of 50 percent of the gross tonnage.
Paragraph 63. Section 5 of Article XII which formerly authorized the ded-actim'
of double-bottom feed water compartments is no longer effective (see paragraph 15),
Paragraph 65. In determining the propelling power deduction under Article XIII
spaces occupied by lubricating oil storage tanks, fuel oil or fresh water tanks, work
shops, storerooms, aq refrigerating machinery for cargo (or for storeA on a passonger
vessel) shall be subtracted from the engine room when calculating the deductionfor
propelling power. lee machines and dynamos deductible under paragmphs 46ou'd
47, also space for stores, are to be included if in the open engine room not butkhea4eid
off. If separated off by any device they are not tp be included in the engine room
space but deducted separately when they qualify under Article X. Storerooms am
not deductible under Article X. Where engine rooms have adjacent open galleri44
or flats devoted to miscellaneous purposes, only the parts of such galleries or f4tk,,
reasonable in extent, used for propelling machinery or its auxiliaries, are to, be
included in the engine room measurement.
Paragraph 70 (e). Double-bottom compartments are now eliminated by the
process of measurement and lubricating oil storage tanks are to be included, in the
same category as fuel oil storage.
Paragraph 75. Attention is called to the requirement that Panama Canal ton-
nage certificates presented at the Canal must. be in English. Volumes should be
expressed in tons of 100 cubic feet, instead of cubic meters. The tonnage certificate
has been revised to provide for additional deductions under the new rules att d a
space provided for the initials of the admeasuring officer above the signature, of the
official authorized to sign the certificate.
Supplies of the new tonnage certificates may be obtained without chm, ge by
admeasurement authorities from The Panama Canal, Balboa Heights, Canal Zone;
or The Panama Canal. Washington, D. C.
Paragraph 92. Article XXV (an addition to the former rules) confers 6n the
Board of Admeasurement the power, under the Governor, to interpret and apply
the rules for measurement.



BALBOA HEIGHTS, C. Z., January 20, 1938.


AdWeeW talmetatlow and ZzVftmtwy Notes by the Boord of AdmeerArement

The following interpretations by the Board of Admeasurement
regaMing the application of the Rules for the Measurement of Vessels
fourth Panama Canal, effective March 1, 1938, approved by the Gov-
ernor in accordance with Paragraph 2, Article XXV, of the Rules are
hereby published for the assistance and guidance of officials concerned
with the admeasurement of vessels for Panama Canal tonnage.
lMeie W"terpretations supplement the interpretations printed in the
Appendix, page 36, of the pamphlet Measurement of Vessels for the
Panama Canal, the paragraph numbers corresponding with those in
the Rules for Measurement to which the notes refer.

C. S. RmLEY,

ftropaph 6. Article 111. The space frequently found at the after end of a
raind house on or above the upper deck, not used for any purpose, with no pro-
tution other than the overhang of the deck above, and the extension of the house
at Owsides, and with no means of closing, is not to be considered a permanently
eavered and closed-in space under the meaning of this article and therefore may be
monly from measurement. When used for such purpose as a veranda cafe requiring
ame protection the space is to be included in the gross tonnage and deducted on
pusenger vessels under Article X, Section 11, as a public room. It is not deductible
as a PwAk room on a lion nmger vessel.
Fm *Vaph 10. Article IV, Section I (a). When a portion of an open deck is
ghmsed in for protection against the weather for use as a promenade it is not to be
di"uslified as an exemption provided that then is no thwartship closure bKween
At ghuW-in portion and the open dwJL If the after end of the glamed-in portion
40 so closed an to make the space suitable for such me an a card room, writing room,
or palm room it is to be included in the mr tonnage and deducted on passenger
!im ml under Article X. 11. as a pubfic room. It is not deductible as a
pubfic room on a nonpassenger vessel. Similarly if a portion of an open deck is


closed at the sides for a short distance as a prott&ion agaiast injury it io *4
disqualified as an exemption whenthe space is not used for any, purpose anst 0
no closure at eithir' dnd.
Swimming pools situated above the upper deck and not covered but open to
weather will be exempted.
Paragraph 43. Article X, Section 1. A hosotal for the use of the offwto-
crew is deductible under Section 1, but ahospital qn, a passenger vessek
jointly for passengers and crew is not deductible. A nonpassenger veswt li il
as a cargo vessel having accommodations:for not more than 12 passengers.
spaces as hospitals, mess rooms, pantries, cook hotises, galleys, bakeries,
rooms for ice machines, condenser space, and distilling rooms, deducted under''
tions 1, 2, and 4 when used exclusively for officers and ere *, shall not be disq
for dedtiction on a nonpassenger vessel even though also used for the limited
gers.permitted. However, no space is to be deducted an a nonpassentw vt*W,,0, 4;1,
public room and therefore such spaces as lounges, smoking rooms, dininig,"how.,ii?
social halls, and veranda cafes provide for the use of the limited passeng"* VW
mitted, are not to be deducted on nonpassenger vessels.
Paragraph 47. Section 5. A telephone station. room used primarily in dock* f!k ,
vessel, etc., is deductible as navigation space, but a telephone room operated as
service to staterooms is not deductible.
An office used by the Chief Officer and other ofricers,: and an office u*id Of
Chief 'Engineer and other engineer.4 may be, deducted asChief Oflicer's and 0xiot.
Engineer's office respectively regardless of lt)cation,. but only one such offkA for t*
Chief Officer and- one for the Chief Engineer is permitted ar,. a deduction on, wW
Paragraph 52. Section 9. Passages and passageways designed primarily for serv-
ing deducted spaces shall be deducte& When in addition to the deductible SpAtes 4L
passageway also serves one or more nondeductible sKees such as lockers for linen
litores or a spare '-;;
mops, dishes, switchboards, etc., as well as stewardsl room, s
passageway shall not be disqualified for deduction. A passageway, however, serving
conjointly deductible and nondeductible spaces such as staterooms reached only by
such passageway cannot becoosidered -as designed primarily to serve *duqiW
spaces under the meaning of this wtion and is.not deductible. However, if ocoe"
to the nondeductible space or spaces by such a passa geway is: only. in6denti4 a4
there is access thereto otherwise, especWly by a more direct roqte. such a pawag&F&y,
should not be disqualified as a deduction. Fore and aft passageways open at tho
ends are to be included in the grow tonnw and deducted, under the : same PrOVISM)",
as cited above.
Paragraph 54. Section If. Deck or lounge pantrits, ow*estra flaft, passeeger
deck-chair lockers, purser's or freight offices and printing shops are nat dedu#ible
as public rooms. (See Wso Notes og Paragraph:6, PqraVVh19,..aad Paragr4plr.43
with reference to deduction of public rooms on passenger aW wapumagervwWo.)
Yachts. There will be no change in the present tresitment:of yadAs. Yachft
are not considered as commercial vessels and unless engaged'iti carrying cwgo or
passengers for hire will be granted the ballast rate. Spaces occupied by or approo
private to the use of the lofficm and crew of a yacht are deductible, but the "ces
occupi6d by the guests either as stateroam or otherwise are not deductiWo.
No space shall be a p1blic rooln ort A ya**


INDEX Pammph Number
Rules Apomclix

404:twto propelling machinery space, defined --------- so so
16 16
Ammunition -------------------------------------- 42(e)-47 ---------
Axlebor var -------------------------------------- 47 ------------
of rules for measurement ---------------- 82 82
Arnked g=rds on commercial vessels ----------------- 43 ------------
Army and Navy transporta ------------------------- 1-42 ------------
Awffliary powered vessels -------------------------- 56 ---------- -

Bakeries ----------------------------------------- 46 ------------
Ballast spaces ---------------- ------------------- 53 53
Berber shops ------------------------------------- 54 ------------
Bath and washrooms ------------------------------ 43-54 ------------
Blau tonnage certificates, whereebtainable ---------- 75 75
Board of Admeasurement, final authority ------------ 82 82
Boatswain"s stores --------------------------------- 42-49 49
Breadths of transverse sections --------------------- 28 ------------
Breaks ------------------------------------------- 33-37 33
Breeks in double bottoms -------------------------- 25 --------- -
Bulkhead, defined --------------------------------- ------------ 65
Capstan ----------------------------------------- 47 ------------
Carpenter shops ---------------------------------- 47 ------------
Q on Army and Navy transports, supply ships, etc. 42 ------------
C*Wng, thickness of, in superstructures -------------- 34 ------------
Certificates, form of ------------------------------- 75 ------------
CIWn lockers ------------------------------------- 47 ------------
Chart rooms -------------------------------------- 47 ------------
ChiWren'B playroom ------------------------------ 54 ------------
Classes of vemels, as determined by length ----------- 24 ------------
Closed-in spaces, definition ------------------------- 6 ------------
Coaming to open deck spaces ----------------------- to 10
Cook Guard vessels, armed ------------------------ 3-77 3
Coomouse --------------------------------------- 46 ------------
Coluffs ------------------------------------------ 3-42 ------------
Companion houses, treatment of -------------------- is 15
cxacrete ships ------------------------------------ 30 ------------
Condenser spimes. --------------------------------- 46 --------- -
Crew space deduction ------ ----------------------- 43 43
CAdAc meten to tons ------------------------------ 31-36-37-80 ------------

Deep tanks --------------------------------------- 53 13-53
Deducted space% if used for caw, to be added to net
tonnage -------------------------------------- 72 --------- -
Deductions for vessels not propelled by engines, how to
niessure -------------------------------------- 39 ------------
Depths, in hold ----------------------------------- 26-27-28-30 ------------



PtragMph Nw*ber
Rwes Appertft,

Depths of open vessels ------------------------------ 38 -------
Depths of transverse sections ----------------------- 26
Dining saloons, passengers ------------------------- 54
Dispensaries -------------------------------------- 43
Displacement of warships -------------------------- 2-79-80 -------------
Displacement, how to determine, when no scales avail-
able ----------------------------------------- 81
Displacement curves ------------------------------ 2-79L80
Distilling rooms ----------------------------------- 42-46 ------------
Division of sections --------------------------------- 24 --------
Domes and skylights, treatment of ------------------ 16
Donkey engines and boilers, treatment of ------------ 51-59-65-70:
Double bottoms not horizontal, measurement of trans-
verse sections in way of ------------------------- 27 --------
Double bottom tanks, treatment of ----------- 7 - - - 13
Draft of warships --------------------------------- 2-78-79
Dredges --------------------------------------------- I
Drydocks ------------------------------ ----------- I
Dynamos, space for ------------------------------- 47-65
Effect of absence or-presence of ceilings on general
dimensions ------------ I ----------------------- 26-34
Electric searchlights ------------------------------- 47
Elevators -------------- S4
----- ------ --------- 7--
Empty vessels, measurement of gross tonnage -7L 23-24 -------------
End openings in superstructures ---------------------- 10(b)
Engineers'shops ---------------------------------- so
Engineers' storerooms ------------------------------ 65
Engine room space, measurement of ----------------- 66-67-68-69 -------
Engine room space, parts of -------------------- ---- 65
Exempted spaces ---------------------------------- 9 to 16
Exempted spaces, cargo in -------------------------- 13.

Fire-fighting machinery ---------------------------- 47 47
Fixed coal bunkers, not to be available for cargo ------ ------------
Forecastle, measurement of -------------------------- 33. 3,%
Foyers ------------------------------------------- 54 ------------
Fresh-water tanks in engine room ------------------- 65-68 a 3#
Fuel allowance when in ballast ----------------------- Page 7 ------------
Fuel oil tanks ----------------- 7 -------------------- 58-65-70 --------------
Fumigating machinery ----------------------------- 47 47

Galleys and cookhouses, when deductible-------- 46 ------------
Gross tonnage, spaces included ----------------------- 4 ------------
.Gun mounts -------------------------------------- 42(e)47 ------------
Gymnasiums ------------------- ------------------ 54 ----

1w VWSELS 41


------------------------------ 14 ------------
lkipw *hip ------------------------------------ 1-1942-44 ------------
----------------- ---------------- 46-65 46-6S
1k, Wadf defined -------- ; ------------------------ Page 7 ------------
;WWwwood mystan --------------------------------- 27-30 30

Lmj" sum bow to meame ------------ ----------- 36 ------------
------------ 49 ------------
------------------------------------- 46 46
UbmriaL ----------------- A ---------- ------------- 54 -------------
Ulm sad air. 'above &,vt der 4d64*4de evction- - - 12-6o ------------
LA& and airi Am tier. sicWtommide am ct ion ---------- 12-58-70 ------------
of dadva*d %am- - ------------------- 55-61 ------------
of Propeging power deduction ------------- 61 61
------------- ------------------ 43 ------------
1 jwith -------- 27 27
lAmbout bammew.: ---------------------------------- 47 ------------
------------------------------ 54 ------------
twokating;iUn- in ensine r n ----------------- 65-70(e) 65-WXe)

abops ------------------------------------ 42-M so
Sawhaim to bwbLt spsam6 ankibw in size ------------- S3 53
Um lei, g or m P fikation of spem deducted ----------- sS-6i ------------
Now thkkum d eWi --------------------------- 34 ------------
.1 1 :and!' F P w 'm ------------------- 43 43
MWP &vidm of Sength, depth d ----------------- 26 ------------
Maorom "itm oUnwanwing vemeb to be umd-- - - 21-22 ------------
Musk UWUML ------------------------------------- 54 -* -----------

trwninj *60de- ------------------------- 3-76 3
simms, deductible ----------------------- 47 ------------
wit Lwftga ------------------------------------- 3940,56 ------------
Sompaw Ow vmd defi ----------------------- ------------ 46
'No spm* not -induded in tomnam to be deducted ------ 71 33
----------- ---------------------- 54 ------------
Wwabor of dWaiam of deptb of bwwmn maction of
4%4 v *Wborhmital dmdbk baftwu ----------- 29 ------------
N=Wbw of &vWam: al depth of bwwvem adion ai
wkk-- double botbomn----- 25-27 ------------
11 P g: of bammme Wudft and 29-31 ------------

and d"W', m Weds an on Iwo mile- 43.'. 43
I --------------------------- 47 41
sathwbod to P met vamb m&km
----------------------------- 73



INDEX Paracravk X*R&W

Open spaces ----------------------------------- 10-11 J*
Open vessels, how to measure ---------------------- 38
Ownere option of method of propelling power deduction- 62 ------------
Owners' room ------------------------------------------------ 44

Paint rooms -------------------------------------- 49
Pa ama Canal net tonnage, sole basis for tolls --------- 56
Panama Canal tonnage rules solely to govern closed-m
spaces --------------------------------------- 8 -------
Passages and passageways, when deducted- 43-52-54 ------
Passages running fore and aft open at ends 10(c) -------
Passengers, definition of, on transports, hospital ships,
etc -------------------------------- I ---------- 19
Passengers' space --------------------------------- 19-4144 46
Peak tanks, capacity, deductible -------------- ------- S3 S3
Permanently covered and closed-in spaces, definition of- 6 --------
Persons authorized to measure vessels and issue ton-
age certificates -------------------------------- 73 ------
Pilots' room, deduction for ------------------------- 43
Promenades -------- -------------------------- N__ 54 --------
Propelling power deduction ------------------------- 58 to 70 ------------
Propelling power deduction limited ------------------ 61 161
Poops and other superstructures -------------------- 33 33
Public rooms for passengers, deductible 54 54
Pump rooms -------------------------------------- 51 sit
Questions, to whom submit ------------------------- 82

Rates of Toll, Proclamation by the President Page 6 ---------
Rules for Measurement of Vessels, Proclamation by
the President --------------------------------- Page 9 ------------
Round of beam ------------------- ----------------- 26

Sail rooms, deduction for --------------------------- 48 - - - -
Settling tanks ------------------------------------- 6&70(ey: -------------
Shaft trunks, how to measure ------------------------ -------------
Ships not provided with fixed bunkers, propelling power
deduction ------------------------------------ 64-654"7 ------------
Shops, engineers ------------------------------- 50-1 so
Side openings in superstructures, etc ----------------- 10(c)-ii ------------
Side-to-side erections, definition of ---------- ------- 10(c) ------------
Signal rooms, other than lamp room ----------------- 47 -----------
Skylights and air shafts, treatment of ---------------- 16 16
Smoking rooms ----------------------------------- IS-54 ------------
Social halls ------------- ------------------------- 54 ------------
Space between tonnage deck and dKk 32 --------
Spaces exempted from 10 to 16 -------------


INDEX Passmob Numba
RWw Awmft

Spum for ammunition on vessels of Commove- 47 ------------
Spwn for gun mounts an veseeb of commerce -------- 47 ------------
Wknved in'lin of fixed shaft tunnels ----------- ------------
Spam necessary for propet working o( en&a-- -- - - 65 ------------
Spmees occupied and appropriated to use of officers
and cmw ------------------------------------- 43-44 43
Spam occupied by and appropriate to use of the
Walter ------------- : ------------------------- 45 ------------
Spaces opposite side openings ----------------------- 10(c)-i I ------------
4 0 foonw -------------------------------------- 43 46
Swotory PrOVWOGIL ------------------------------ Page 5 ------------
s n n s, other than for boatmain's stores, not
deductIlAe ------------------------------------ 42 ------------
M engine roorn ------------------------- 42-0-72 6S
SIM a name an transports, coniers, supply ships, etc.--- 42 ------------
d&-- L- of lower part of tradsveirse section -------- 29-30 30
S, ; -netureg, how to measure -------------------- 33-37 33
Supply shiPM -------------------------------------- 3-42 ------------

Talq*ane apparatus as deduction ------------------- 47 47
Toll an warsitips, how based ------------------------ 76 ------------
ToU mtest Waded, in ballast ------------------------ Page 6 ------------
Tonnage certifimtes presented, to be in English language 75 75
Tonnage certificates presented, subject to correction
by Canal ogicia ------------------------------ 74 ------------
Tannage certificates. to confam in substance and form
to sampte appended --------------------------- 75 ------------
Tonnage deck, definition of ------------------------- 23 ------------
Tonnage length, haw to ------------------------- 24 ------------
Tannage d tankx, how to find ---------------------- 13-53 ------------
Tannage qpeniap --------------------------------- 10-11 ------------
Tonnage openium effect of dkxft ------------------ 11 ------------
Topide: ton ------------------------------------ 34 ------------
Trausport,6 Army and Navy ------------------------ 1-42 ------------
Thunit for repairs or entering drydock --------------- Page 9 ------------
Tramwerse fmming, without douW&bottom tanim- - 30 ------------
Trunks ------------------------------------------ 7 ------------
Tom fimit an propelling pown deduction ------------------------ 61
TWwd tanks ------------------------------------- ------------ 13
Tweta ------------------------------------------ 7 ------------
Tween dwh spacen, how to messure ----------------- 32 ------------

Upper declt -------------------------------------- 6-7-12-23 -----------
Use of a portion of a deducted effect of -------- 71 ------------
Um of a portion of an exempted epwe, efiqct of ------- U ------------

4 4iiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiii iiiiiiiiiii

INE aaip une
Veran a caf s --- ----- ----- -----i---- -i54
Veslprple'y niedeuto fr-----5 o7
Vessels~i reurnidslcmetsaeadcre
Vessels requiing.a.tonnage.........tei.
W ard nd dessin roo s --- ---- ----- ----i---- --i4
Warshis, deinitin of ----------- --------------ii
W a s ip ,d afs--- - -- - -- - -- - --- -2-87
Wasistls sese ndipaemn onae---2 6.---
Water ~ ~ ~ ~ ~ ~ ~ ~ ~~iiii iiiat~pae deutbe-----------5
Wae-lsesltinsec,'hnddutbe---4-4 ------
W h e o se ------ - - ---- --- 7
Wigtnk ---------------- -----/-5/1

mmm mom mom





4400-4 MR 57203-Panama Canal- 11-10-37-2,000


The spaces measured for gross tonnage in this ship comprise the following and no others, viz:

1. Under the tonnage deck, viz:

(a) Between tonnage deck and double bottom ......................................................-- .....

(b) Double-bottom compartments for cargo (Art. IV, Sec. 4.) ---------------------------------------------------------

Total space under tonnage deck ----------------------------------------------------------------------------------------------------

2. Between tonnage deck and upper deck: Lower tween deck --------------------------------------------------------------------------------

Upper tween deck ------------------------------------------------------------------.--..............
3. Permanently covered and closed-in spaces above the upper deck:

(a ) F o reca stle ....... ...... .. .... .. ----- --- ------- ---- -- -- -- -- ------------- ------ ----- ------ ---------------........... ..

(b) Bridge space ------------------------------------------------------------------------- ------------

(c) Poog pae--------------------------------------------------------------------------------- ------------

(d) Break or breaks --------------------------------------------------------------------------- ------------

(e) Turret----------------- tons, (1) Trunk ----------------------- ------------ tonls ------

(g) Roundhouses-------------- tons.----------- tons,----------- tons,----------- tons,----------- tons

---------- tons.---------- tons,----------- tons,----------- tons,----------- tons,----------- tons

--- -- -- t ns- --- -- -- to s --- -- --ton -- -- --- on -- -- --- t nstons--- -- -on ----- -- -- --
---------- tons,---------- tons,----------- tons, ---------- tons,---------- tons,---------- tn

------ os------ tons------ ----- tons----------- tons----------- tons ------- tons--------

(ns) Sidechouss--------------- tons,----------- tons,----------- tons ---------- tons,----------- tons

---------ton --------ton --------ton -------- tons,-- --------- tons-- ---------- n

------tn------------ tons----------- tons----------- tons, ---------- tons ----------- tn

---------- tons----------- tons,----------- tons,----------- tons ---------- tons,----------- tons

Total--------------- tons. One-half percent ofthe groustonnage--------------- tons. Excess ---------------

Total permanently covered and closed-in spaces above the upper deck-------------------------------------------

PANAMA CANAL GROSS TONNAGE------------------------------------------------

2 Gross per contra --------------
I. crew accommodations: -tons, Cooks------------------ tons
(a) ApprentiCes ------------------ tons, Donkeyman ----------------
Boatswain -----..-........... tons, Greasers .................... tons . ..------------------------ tons

Carpenter ------------- tons, Oilers -------------------- tons, Messboys ------------------ tons
Q uarterm asters ----------- tons, Firem en -------- -. -.------- tons . . ..--------------------- -.- tons
Seam en ----------- ------- tons, M otorm en ------- -.--.--- tons, Stewards ------------------- tons ------------
.............................-tons, -..............-.------ tons, -............--------------- tons
...... tons, .......------------- ------ tons -........................... tons
...... .................. tons, -.......- ----------------- tons ............................. tons
P a s s a g e w a y s - - - t o n s -. . . . . ..- . . t o n s - - - - - - - - - - - - - t o n s
(b) M essroom s .... ...... tons ............................. tons, Hospital -------- - -------- tons
..................tons, ......................... tons, ...........................-- tons
Bathrooms ------------ ..tons, .......................... tons, Med. Lkr .................... tons
t o n s . . . . . ..- - t o n s . . ..- - - -tO ns

2. Officers' accommodations:
(a) Ch. Offr's cabin ----- tons, Ch. Engr's Cabin ... ....... tons, Doctor ------- -t-
Ch. Offr's Office tons, Ch. Engr's Office ---- ----- tons, Purser ------ - -- tons
2d Officer tons, 2d Engineer ----...- -- -tons, Radio Operator --------------- tons
3 d O ffice r to n s, 3 d E n g in e e r ---- ... .. . . . to n s -- - - - - -- - - - - - - to n s
4 t h O f fi c e r t o n s 4 t h E n g i n e e r . . . . . . .. t o n s C h i e f S t e w a r d - - --- - - - t o n s
Pilot tons, 5th Engineer ------- tons, Electrician ......... tons --------
tons, 6th Engineer ----... ........-tons, Ch. Refrig. Engr .----------- tons
tons.....----,. ------------........ tons, -..... ---------------------- tons
tons, ---------------------tons ............................ tons
tons, .. ......... .....tons, -............................. tons
Passageway tons, --tons, tons
(b ) M essro o m s : O ff rs' to n s, E n g rs' .... ..... to n s P e tty O ff rs' ....... ....... .. to n s
(C) Bathrooms: Oftrs' tons, Ch. Engr's .... tons, Petty Offrs' ................ tons
to n s, E n grs' .. ton s . .. ....... ....... tons I
(d) Master's Cabin tons, Office tons, Bath -----.....-tons-
Passageways tons, --.. ...........tons, W. C ........................ tons-

3. Galleys, bakeries, etc., for exclusive use of officers, engineers and crew:
Galley tons, Pantry (Offrs') ---- tons, Bakery tonsl
tons, Pantry (Engrs') ------.......tons, tonsi

4. Lavatories, water-closets, etc., for exlusive use of officers and crew:
Olliccrs' W. C.- tons, Engineers' W. C. .. --------- tons, Seamen's W. C .----------- tons
ton s, . ..... ....... .......-ton s, ton s -
Petty Oflrs' W. C. tons, Motormen's W. C ---- ------ tons, Firemen's W. C -------------- tons(
Passageways tons, ..... ........... .. .... tons, tons

5. Spaces used in working the ship:
Wheelhouse tons, Chain locker --------- tons, Carpenter shop ....... ton3
Chart house tons, Anchor gear ----- tons, Ice machine -------.---------- tons
Radio house tons, Steering gear -------- -----tons, Battery room --------------- tons]
L o o k o u t h o u s e s t o n s D y n a m o .. . . .. . . . . .-t o n s F i r e E x t M a c h y - - - - - -- t o n s -
Gyro compass tons, Pump room-- tons, Donkey boiler ...............-tons
tons, ... ...... .... .. tons, --------------------------- tons
Passageways tons, --------------- ------- tons, ...........................- tons

6. Sailroom, Art. X, Sec. 6 (llmited)t ...................................-torts, Total --------------- ------- tons]
Engineer's shop, Art. X, Sec. 7 (lim ited) ...... ........... -...... tons, Total ------------------------ tons i

7. Boatswain's storerooms, Art. X, Sec. 7: Peaks ------------ ----- tons, Lamp room ---------------- tons I
tons, -.tons, Paint room ------------------- tons,
tons, .... .................. ...... tons, T otal ---------- -.------------ tons I

8. Water ballast or fresh water spaces, Art. X, Sec. 10: F. P. T.- -------- tons, A. P. T -------------.------ tons
---- ton s, .......................- -- ton s, ---------------------------- to n s -

9. Public rooms for passengers, Art. X, Sec. 11 (Itemized on page 3) ........................................-tons ..............

Total deduction other than propelling power" ...........................

PANAMA CANAL NET TONNAGE (without deduction for propelling power) -----

(a) Engine room as measured j Below deck -------------- tons, Tween deck ................. tons
(Arts. XII, XIII, XIV) In bridge ----------------- tons, In poop ------------------ tons I ------------

and (b) In a vessel with screw propellers +75 percent of engine room as measured (Danube Rule) ...........
or (c) In a vessel with paddlewheels +50 percent of engine room as m easured (Danube Rule) -------------
or (d) With fixed coal bunkers or tanks and double-bottom compartments fitted for stowage of fuel oil ....
Total deduction for propelling power-- ...............................-------------__________

PANAMA CANAL NET TONNAGE (power deduction by Arts. XII, XIII, or XIV) --------------------------------

Bunker fuel for BALLAST RATE limited to: Coal ---------------- long tons or Oil -------------- long tons

No spe, oterten fuel pam deducted uder Aride X111 o, pao~m, e Ro1e, 5t be idae ,
t Reference to articles end seatio we0t. te0 R et for t he es, urf4eU mO t of V .eIo t 5, P Ao., be C ao lo' a ted the t
SLiMited to 50 perost of greee

Public rooms for passengers deducted under item 9, page 2:

. . . . . . . . . . . . . . . . . . . . . .T o ta l .. . . . . . .

The following spaces and no others have been exempted troml gross tIonnage
1. O p e n d e c k sp a c e s A rt. IV S ec I (a )-- (N a m e a n d g iv e lo c a tio n ) . .-- -- - - -- -- - - ----- -- -- -- -- -- --- - -- -- -- - -- - -- - -- -- - -

2. Opposite end opening~s, Art. IV, Sec. 1 (b)--(Name and state dimensions and tonnages):
F o re c a stle .. . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . .

P o o p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. Opposite side openings, Art. IV, Sec. 1 (c)--(Name and state dimensions and tonnages):
F o rec a stle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B rid g e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. Opposite side openings, Art. IV, Sec. 2--(State location, dimensions and tonnages):

5. Above the lowest side-to-side erection, Art. IV, Sec. 3--(State tier, dimensions and tonnages):

6. Double-bottom spaces, Art. IV, Sec. 4--(Name or give numbers of the compartments) ........ .... .........

7. Companion houses, Art. IV, Sec. 6--(State location and tonnages):

8. Domes, skylights and air-shafts, Art. IV, Sec. 7--(State location and tonnages):

9 S t a t e a n y o t h e r p a r t i c u l a r s o f e x e m p t e d s p a c e s . . . . . .- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

THIS IS TO CERTIFY that the -- -- ship above-named has been measured in accordance with the Rules for Measurement

of Vessels for the Panama Canal, and that the particulars of tonnage contained in this Certilicate are correct, -....................
Given under my hand at.......................................---------------------- -------this .......... day of -.... ,19.


( Official Posltlon)