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(4) All permanent closed-in spaces affecting a vessel's register tonnage, is situated elsewhere available for cargo or obliged to make application for adstores, or for the accommodation of the measurement or tonnage adjustment as crew, or for the charts, except cabins or the case may be, in writing, to the collecstaterooms for passengers, constructed tor of customs of the district in which entirely above the first deck which is the vessel is located. Such application not a deck to the hull;
shall be made before cargo or ballast is (5) The excess of hatchways.
taken on, and in case uf a new vessel, be(c) The gross tonnage of a vessel fore boilers or engine is installed or commeasured under the provisions of $ $ 2.80 partments partitioned off. through 2.100 shall be determined as provided by $ 2.86(a).
§ 2.9 Drawings. (T.D. 66-57, 31 F.R. 4294, Mar. 11, 1966)
(a) Plans to be filed. In order to fa$ 2.6 Net register tonnage.
cilitate admeasurement, there shall be
furnished by the vessel's builder or owner (a) The tonnage of a vessel remaining to the collector of customs for the district after the authorized deductions have in which the vessel will be admeasured, been made from the gross register ton- either with the application for admeasnage shall be deemed the net register urement or a reasonable period before tonnage. Under the provisions of 2.87 admeasurement is scheduled to com(b) a vessel may have two net tonnages.
mence, blueprints or drawings of the The higher net tonnage is applicable following: when a tonnage mark which is placed (1) A drawing of the cross section in and displayed on the side of the vessel which is shown the construction of the is submerged and the lower is applicable double bottom, if there be one; when the tonnage mark is not sub- (2) An inboard view of the longitumerged.
dinal section, showing the double bot(b) In ascertaining the net tonnage, tom, its use or uses, if existing, otherwise no space may be deducted unless it has
the floors, the compartments for water previously been included in the gross ballast, other than the double bottom, tonnage.
the decks, the superstructures, hatch[28 F.R. 14553, Dec. 31, 1963, as amended by ways, etc.; T.D. 66–57, 31 F.R. 4295, Mar. 11, 1966)
(3) Deck plans showing the arrange§ 2.7 The marine document.
ment and uses of different compart
ments and deductible spaces; The marine document of every vessel shall show the date and place of build,
(4) Drawings showing the arrangethe register length, breadth, depth, and
ment of the engine, boiler, and fuel the height of the upper deck to the hull
compartments; and above the tonnage deck; if applicable,
(5) A tonnage plan showing half
breadths of the sections at the points of the depth (Ds) and the length (L.) used
division of the tonnage length of the with the tonnage mark table and the
vessel into a certain number of equal distances to the tonnage mark from the
parts in accordance with the rules for line of the upper deck and from the
the measurement of spaces under the molded line or equivalent of the second
tonnage deck. The scale or scales of deck; the number of decks and masts; build as to her stem and stern; capacity
these drawings are to be indicated
thereon. under the tonnage deck, that of the between decks, and also separately, per
The collector of customs is to be admanently enclosed spaces on or above
vised of any subsequent changes in the the upper deck to the hull required to be
vessel and furnished copies of the corincluded in the gross tonnage, and the
rected plans, or a statement of such omitted spaces, whether open or closed
changes. in, on, above, or below the upper deck;
If there are no blueprints or drawings the gross tonnage or tonnages; items of
available and if the collector is satisfied deduction; and the net tonnage or ton
that it is impracticable to require such nages.
plans to be prepared and made available,
considering the size and nature of the [T.D. 66–57, 31 F.R. 4295, Mar. 11, 1966)
vessel as well as the cost and time in§ 2.8 Application for measurement. volved, the vessel shall be measured with
The builder of a new vessel required out requiring their production. to be admeasured, or the person having (b) Sketches. When blueprints or supervision of changes and/or alterations drawings are not produced, necessary rough sketches may be made during the feet. The movable or index rod in each course of admeasurement showing the has an arrow index traversing a decimal inboard profile, the midship cross-sec- scale on the fixed rod. Greater depths tion, the hull and deck arrangements, may be taken by inserting into the ends and related matters, recording any nec- of the index rods, an extension piece, essary dimensions and showing details provided with sockets for this purpose of important features such as the depth one or more joints of lift rods described of side and bottom frames or floor below: timbers; the dimensions, location, and
The fixed rod is graduated in feet (in use of structures and hull spaces; and red) and tenths and half-tenths (in black); the thickness of the inner and outer skin. and when the ends of the rods are well Such rough sketches shall be retained together the arrow on the index rod points and filed with the other admeasurement to the figure indicating the constant length papers. The rough sketches made shall
of the fixed rod, and as the index rod is not be redrawn to scale unless the ad
moved up the arrow indicates the length
from the upper end thereof to the lower measurer is satisfied that such action is
end of the fixed rod. Bear in mind, hownecessary to insure that accurate dimen
ever, that when you use any of the attachsions have been lifted, to avoid the neces- ments referred to above you must add to sity for readmeasurement, or to insure the reading on the fixed rod the net length against a claim of error which may of the attachment used; e. g., if the 6-foot reasonably be expected to be made in a
rod is extended to its limit, 11 feet, which
is reached when the arrow on the index particular case by the owner or agent.
rod is fair with the upper end of the fixed § 2.10 Measurements to be taken at an rod, and the extension piece is attached, early stage.
which is done by slipping the bands on the
lower end of it over the upper end of the Admeasurement should begin as soon index rod until the upper edge of the as the vessel is sufficiently advanced in upper band is fair with the upper end of construction to permit its being done, the index rod, and by fastening (on the usually when the decks are laid, the hold
groove side of the index rod) with set cleared of encumbrances to admit the
screws in the said bands, the length will
not be 11 feet, as shown by the reading, required depths and breadths being
but 16 feet, the reading plus the increment properly taken; before the engine and due to the attachment (11 feet +5 feet). boilers are installed and accommoda- This increment may be further increased tions are partitioned off.
by inserting into the end of the extension
piece one or more joints of lift rods, each $ 2.11 Uniform system required.
of which is about 3.95 feet when adjusted. (a) The following directions are given
At the station of the area to be measshowing the progressive steps to be fol
ured in single-deck vessels the rod is to lowed in the process of admeasurement.
be placed on the ceiling, or floor beam or
timber when no ceiling is present, alongside It is important not only that the rules
the keelson or line of the keel, perpendicular be followed, but that required measure
or square thereto, and also parallel to the ments be taken and calculations made
middle longitudinal plane of the ship, and in a uniform and correct manner that forced up firmly under the deck and fixed one general system may prevail in such position by the set screws; from the throughout the service respecting this depths thus found take one-third of the subject.
round or one-half of the pitch of beam to (b) Measurements taken aboard are
get the depth of the area. to be recorded in the "Memorandum of
The depth of an area taken as above is to Dimensions" known as Form 1413.
be divided into the required number of equal
parts. (See $ 2.29 (d).) With the rod fixed § 2.13 Measuring instruments.
in position as above, set off on it from its
lower end one of these equal parts, or com(a) The measurements should be
mon interval between the breadths, using made with a waterproof tape, graduated white or other colored chalk or material that into feet and tenths of a foot, and as will make a visible mark, which gives the nearly inelastic as possible.
position of the first breadth above the bot(b) Sliding rods which are of three
tom breadth, and from this when the rod is sizes: One 3 feet long for taking depths
taken down the positions of the remaining
breadths are to be set off at the said comfrom 3 to 5.8 feet; another 6 feet long
mon interval. for taking depths from 6 to 11 feet, or,
The positions of all the breadths being with the extension piece attached, to 16
thus severally marked on the rod, it is then feet; and a third one 11 feet long for to be set up again and firmly fixed or held in taking depths from 11 to 21 feet, or, position, and the breadths may be readily with the extension piece attached, to 26 and correctly measured by means of the tape
held at right angles across the rod at each of the positions marked thereon.
In measuring vessels with more than one deck, where the second deck from the bottom is the tonnage deck, it will be necessary to use two of these rods in combination, one directly over the other, one in the hold under the first deck, as directed for single-deck vessels, and the other in the space between this deck and the tonnage deck. In this combination the tonnage depth is found by adding together the two depths and the thickness of the deck between the rods and deducting from this combined depth onethird of the round or one-half pitch of beam; then proceed as before directed.
(c) A 2-foot rule with a hinge is required for taking the rake of the bow and stern and for other purposes.
(d) A carpenter's square will be found useful for setting the sliding rod perpendicular to the keelson.
(e) For taking the breadths in the hold which are beyond the reach of the measuring officers two lift rods will be needed, each about 8 feet long (made by joining two sections), one having a pulley at the end over which the tape may be drawn when the rods are held in position and the other an attachment for holding the ring at the end of the tape.
(f) For transferring the location of the stations or ordinates of the transverse sections from the deck to the keelson, and sometimes, for finding registered breadth, a plumb line and bob are needed.
(g) For measuring laden vessels for Panama or Suez Canal tonnage certificates, a girting galvanized chain of an approved make is required. § 2.14 Stem.
A vessel's stem is to be described according to its contour; i.e., straight, raked, curved or square. 8 2.15 Stern.
Describe the stern according to its shape at the after end below the upper deck or line of same, as round, elliptical, square or sharp. § 2.16 Masts.
In addition to what are commonly known as masts, spars set up at the center line of the bridging at the top of king-posts of certain vessels for signals and wireless antennae, etc., are to be considered as masts. The number of king-posts and derrick posts, etc., independent of the supported masts are to
be separately stated after the number of said masts; e. g., “Two masts and eight king-posts,” or as the case may be. $ 2.17 Ceiling, cargo battens, etc.
(a) Ceiling. Ceiling hereafter referred to is considered the permanent planking fitted directly on the inboard side of the frames, or floors, or the top of the double bottom. The maximum allowance for ceiling is 3 inches on the bottom and 3 inches on each side. When ceiling is found to be less than 3 inches thick, allow the actual thickness thereof; that is, take dimensions to the face of the ceiling so found. Depths and breadths shall not be decreased due to grounds supporting ceiling nor shall allowance be made for ceiling on the under side of deck beams.
(b) False ceiling. In small vessels with "false ceiling” in a portion of their cabins, in their holds, or forming a part of their seats or lockers, etc., therein, and which stands off from their frames that is, not fitted to them as ordinary ceiling-take the breadths through the said “false ceiling” to the inner faces of the vessel's frames, dcducting therefrom the thickness of the "false ceiling” on each side. If, however, there is a ceiling fitted on the frames in addition to the "false ceiling," take the breadths to the ceiling on the frames, making no allowance for the “false ceiling."
(c) Cargo battens, insulation. Paragraph (a) of this section applies to cargo battens (spar ceiling) and refrigeration insulation. $ 2.18 Register length.
(a) The length measured on the tonnage deck, from the fore part of the outer planking (where it is rabbeted) on the side of the stem of wooden vessels, or fore end of lap of outer plating of steel or iron vessels, to the after side of the main sternpost, shall be accounted the vessel's register length. (See Figures 2 and 3 ($ 2.65).)
(b) In the case of screw vessels with no sternpost, take the length to the forward side of the rudder-stock or line of same extended through the deck.
(c) The register length of scows and barges, with a square bow and stern sloping up from the bottom to the deck, and with neither stem nor sternpost, is to be taken on the deck from the extreme point of the hull at the bow to the extreme point of the hull at the stern; that is, the over-all length of the hull, not including guards or rubbing strakes, is to be considered the register length of such vessel. § 2.19 Register breadth.
(a) A measure from the outboard face of the outer skin on one side to the same point opposite, taken at or below the upper deck and at the widest part of the hull is the register breadth. (See Figure 4 ($ 2.65).)
(b) A practical method for finding the register breadth is, to add twice the sum of the depth of the vessel's side frames and thickness of outer skin, plus an allowance for thickness of ceiling, insulation or cargo battens if fitted, to the greatest tonnage breadth. & 2.20 Register depth.
(a) The register depth is taken at the middle of the tonnage length from the under side of the tonnage deck, or line of same, down to the top of the floors at the side of the keelson; or to the ordinary floor timbers or plates when fitted; or to the inner bottom plating (tank top) of a cellular double bottom; as the case may be, in a direction perpendicular to the keel.
(b) Should ceiling be fitted on the above mentioned bottom members, the register depth shall be measured to the top of same and to this dimension shall be added the height of grounds, battens or other type of support for the ceiling. (See Figures 4 and 5 ($ 2.65).)
(c) If the vessel is measured in parts, as explained later, the register depth is taken at one-half the tonnage length of the vessel. § 2.21 Upper deck to the hull.
The uppermost complete deck, which extends from stem to stern and from side to side at all points of its length and below which there are no openings through the hull as required in shelter deck spaces and also having its hatchways or other openings provided with means for closing them against the action of the sea and weather upon the space below enclosed by the sides of the vessel, making the said space a fit place for the stowage of general cargo, is to be considered the upper deck to the hull. $ 2.22 Enumerating the decks.
In enumerating the number of decks, only those which are without such openings as exempt the spaces beneath from
being included in the tonnage under the upper deck are to be considered. Other decks, if any, containing such openings as exempt the spaces beneath from inclusion in tonnage should be separately described after the number of decks proper; e. g., "Two decks and shelter deck,” or as the case may be. Partial decks, forward or aft, such as orlop decks, are not considered as decks. $ 2.23 Register height.
The height from the top of the tonnage deck planking and/or plating to the underside of the planking and/or plating of the upper deck to the hull shall be deemed the register height of the upper deck to the hull above the tonnage deck. (T.D. 66–57, 31 F.R. 4295, Mar. 11, 1966) § 2.24 Round of beam.
(a) The round of beam (camber) is the perpendicular distance down from the crown of the under side of the tonnage-deck plank or plating at the center to a line stretched athwart the vessel from end to end of the top of the beam and is to be ascertained at every place where it is to be used in the measurenuent. (See Figures 6 and 16 ($ 2.65).)
(b) The round of beam of the tonnage-deck, which must be known before taking the tonnage length, as well as before measuring the depths of the tonnage sections, may be taken either at the under side of the deck by stretching a small line tightly from end to end at the top of the beam, which will show the round or camber of the beam at the center; or it may be taken, if more convenient, at the upper side of the deck by stretching a line tightly across, held at equal heights from the deck at each side of the vessel, so as just to touch the crown of the deck at the middle line; then the distance from the deck to the line at the vessel's sides gives the round of beam. (See Figure 6 ($ 2.65).) It is necessary to take the round of beam at each point of division of the length except when the vessel has a flat deck or one practically so. In lieu of the above methods, it may be ascertained on the basis of one-fourth of an inch to the foot of beam at each section in iron or steel vessels of the usual camber of beam. This method is more accurate and easier of application than the others.
(c) When the round of beam is 0.15 foot or less, it may be ignored. 8 2.25 Pitch of beam.
(a) In vessels whose tonnage deck has a pitch instead of a round from its side at the shell plating to its center, find the height of the pitch of the beam at each tonnage section. It may be done in any practical manner.
(b) The height of the pitch of the beam is the perpendicular distance from the apex at the under side of the tonnage deck plank or plating at the center of the deck down to a straight line from end to end of the top of the beam. (See Figure 7 ($ 2.65).) 8 2.26 Tonnage deck.
(a) Except as to a vessel having its tonnage deck determined under the provisions of $ 2.88(d), the tonnage deck is the upper deck to the hull in vessels having not more than two decks, and the second from the keel in vessels having more than two decks.
(b) If the tonnage deck consists of several partial decks extending with breaks from stem to stern, and if the partial decks are at different heights, the line of the lowest deck will be taken as the tonnage deck, and the headroom above such line under the higher deck or decks will be measured as a break.
(c) Engine and boiler casings, peak tanks and cofferdams are not considered as breaking the continuity of a deck. (See Figures 8 and 9 ($ 2.65).) [28 F.R. 14553, Dec. 3, 1966, as amended by T.D. 66–57, 31 F.R. 4295, Mar. 11, 1966) § 2.27 Tonnage length.
The tonnagc length is the longitudinal distance on the under side of the tonnage deck, or line of same from a point where the line of the inboard faces of the side frames, or ceiling thereon if any, intersects the side of the stem, to a point aft on the inboard face of the stern timber or cant frame, or ceiling if fitted thereon. (See Figures 10 and 11 ($ 2.65).) § 2.28 Depth of a transverse section.
(a) Depth. The depth of tonnage section is a measurement taken at its proper point of division of the tonnage length, from a point at a distance below the tonnage deck equal to onethird of the round or one-half of the pitch of the beam, down to the upper side of the floor timbers or floor plates; or
bottom floors alongside the keelson; or longitudinals; or the tank top of a cellular double bottom, as the case may be.
(b) Ceiling. If ceiling is fitted on the bottom floor members, depths of transverse sections terminate on the upper face of the ceiling of average thickness. (See Figure 4 ($ 2.65).) For tonnage depths where ceiling is fitted on tank top, see Figure 5 ($ 2.65).
(c) Raised platform. In vessels with a raised platform in the bottom and no ceiling fitted on the bottom frame members, the depths are to be taken down through the platform to the upper side of the floor timbers or floor plates as described above, deducting therefrom the thickness of the ceiling of the platform in question.
(d) Depths in way of interruptions to tonnage deck. Should depths of transverse sections fall where the tonnage deck is interrupted, due to a break, hatches, etc., then depths are taken from the line of continuation of the tonnage deck.
(e) Rise of double bottom. In vessels having a double bottom the tank top of which, in way of tonnage sections, rises from the center line to the wings, the tonnage depth of each section will terminate at one-half height of the dead rise. (See Figure 12 ($ 2.65).)
(f) Fall of double bottom. In vessels having a double bottom the tank top of which, in way of tonnage sections, has a straight fall from the center line to the wings the tonnage depth of each section will terminate at one-half height of fall. (See Figure 13 (2.65).) $ 2.29 Tonnage depths.
(a) The tonnage depth. The depth generally referred to as “the tonnage depth" is located at the middle point of division of the tonnage length and is found in a manner similar to the other depths of transverse sections.
(b) Tonnage depth in a vessel measured in parts. Should a vessel be required to be measured in parts, and each part measured as a separate unit; then a tonnage depth shall be found for each part or unit at one-half its tonnage length. (See Figure 14 (§ 2.65).)
(c) Tonnage depth is the first depth measured. The tonnage depth governs the number of parts into which it and all the remaining depths of the part in which said depth is located, is divided.