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sued from time to time and upon reasonable advance notice to the principal local officer concerned, such services may be furnished between the same hours on Saturdays.

(f) Where there is a regularly recurring need for customs services outside the above-prescribed hours, and the volume and duration of the required services are uniformly such as to require, of themselves or in immediately consecutive combination with other essential customs activities of the port, the full time of one or more customs employees, the necessary number of regular tours of duty to furnish such services on all days of the year except Sundays and national holidays may be established with the approval of the Commissioner of Customs.

(g) Customs services shall be furnished private interests otherwise than as specified in this section only in accordance with the provisions of $ 24.16 of this chapter.

Customs seal. (a) The customs seal of the United States consisting of the seal of the Treasury Department surrounded by an outer circle in which appears the words “Treasury Department” at the top and “Bureau of Customs” at the bottom according to the design furnished by the Treasury Department, shall be impressed upon all official documents requiring the impress of a seal.

(b) The impress of the seal is not necessary on documents passing within the Customs Service. The seal shall be impressed on marine documents, and on landing certificates, certificates of weight, gauge, or measure, and similar classes of documents for outside interests.

(c) The oficial seal shall not be used in the manner of a notary seal to indicate authority to administer oaths.

$ 1.8

Sec. 2.7 The marine document. 2.8 Application for measurement. 2.9 Drawings. 2.10 Measurements to be taken at an early

stage. 2.11 Uniform system required. 2.18 Measuring Instruments. 2.14 Stem. 2.15 Stern. 2.16 Masts. 2.17 Ceiling, cargo battens, etc. 2.18 Register length. 2.19 Register breadth. 2.20 Register depth. 2.21 Upper deck to the bull. 2.22 Enumerating the decks. 2.23 Register height. 2.24 Round of beam. 2.25 Pitch of beam. 2.26 Tonnage deck. 2.27 Tonnage length. 2.28 Depth of a transverse section. 2.29 Tonnage depths. 2.30 Tonnage breadths. 2.31 Measuring the tonnage length. 2.32 Divisions of tonnage length. 2.33 Transfer of location of sections to

keelson. 2.34 Transverse areas, rule for finding. 2.35 Breaks in double bottom. 2.36 Vessels having side tanks may be

measured in parts. 2.37 Outside shaft tunnel. 2.38 Square end vessels having head blocks. 2.39 Between decks. 2.40 Superstructures. 2.41 Hatchways. 2.42 Record of exempted spaces. 2.43 Enclosed spaces exempted from inclu.

sion in gross tonnage. 2.44 Passenger cabins. 2.45 Open superstructures on or above the

upper deck. 2.46 Open shelter deck space. 2.47 An open structure on small craft. 2.48 Open vessels. 2.49 Deductions from gross tonnage. 2.50 Navigation spaces. 2.61 Engine room. 2.52 Spaces Included in engine room. 2.53 Length of engine room. 2.54 Boilers and engine in same comparte

ment. 2.55 Engine room measured in parts. 2.56 Rule for measuring engine room. 2.57 Engine room in small boats. 2.58 Deduction for propelling power. 2.59 Light and air spaces. 2.60 Verification of calculations, diagram of

areas, and certification of results. 2.60a Marking net tonnage and official num

ber on vessel. 2.61 Appendix to certificate of registry. 2.62 Measurement of Government vessels. 2.63 Foreign vessels.

PART 2-MEASUREMENT OF

VESSELS

Sec. 2.1 2.2 2.8

Authority of Commissioner.
What vessels are to be admeasured.
Purpose for which measurements aro

taken.
Register ton.
Gross register tonnage.
Net register tonnage.

2.4 2.5 2.6

Sec. 2.64 Adjustment and correction of tonnage. 2.65 Figures. 2.66 Conversion tables. 2.67 Table A of common intervals when

tonnage depth 18 16 feet or less. 2.68 Table B of common intervals when ton

nage depth exceeds 16 feet. 2.69 Definitions of enclosures on or above

the upper deck. 2.70 Definitions of items of deduction. 2.71 Definitions of structural terms, etc. 2.72 Suez and Panama Canal certificates. OPTIONAL DUAL-TONNAGE METHOD FOR

MEASUREMENT OF VESSELS 2.80 Additional closed-in spaces omitted

from gross tonnage. 2.81 Regulations applicable to vessels

measured under the optional dual

tonnage method. 2.82 Capacity under tonnage deck. 2.83 Capacity between decks. 2.84 Capacity of deck structures. 2.85 Hatchways. 2.86 Register tonnages. 2.87 Single-tonnage

and

dual-tonnage assignments for vessels measured under the provisions of the optional

dual-tonnage method. 2.88 Definitions of terms used in $$ 2.80

through 2.100 of this part 2. 2.89 The tonnage mark and form of

identification. 2.90 Longitudinal location of the tonnage

mark. 2.91 Vertical location of the tonnage mark. 2.92 Depth (Dr) used with the tonnage

mark table. 2.93 Length (Lt) used in the tonnage

mark table. 2.94 Figures in the tonnage mark table. 2.95 Tonnage mark table. 2.96 Line of the second deck. 2.97 Line of the uppermost complete deck. 2.98 Placing the tonnage mark in relation

to the deck line. 2.99 Application for measurement accord

ing to the optional dual-tonnage

method. 2.100 Certification as to location of the

tonnage mark.
OPTIONAL SIMPLIFIED ADMEASUREMENT

METHOD FOR PLEASURE VESSELS 2.101 Application for simplified admeasure

ment. 2.102 Definition of terms used in $8 2.101

through 2.105. 2.103 Calculation of gross tonnage. 2.104 Calculation of net tonnages. 2.105 Readmeasurement of vessels admeas

ured under 88 2.101 through 2.105. AUTHORITY: The provisions of this part 2 issued under sec. 301, 80 Stat. 379, sec8.

2, 3, 23 Stat. 118, as amended, 119, as amended, R.S. 4148, as amended, 4149, as amended, 4150, as amended, 4151, as amended, 4153, as amended; 5 U.S.C. 301, 46 U.S.C. 2, 3, 71, 72, 74, 75, 77.

SOURCE: The provisions of this Part 2 appear at 28 F.R. 14553, Dec. 31, 1963, unless otherwise noted.

NOTE: The regulations of this part are under the cognizance of the Coast Guard. § 2.1 Authority of Commissioner.

(a) The Secretary of the Treasury has delegated to the Commissioner of Customs supervision of the laws relating to the measurement of vessels. On all questions of interpretation growing out of the execution of the laws relating to this subject, the decision of the Commissioner is final.

(b) The Commissioner of Customs shall, in the following sections, be referred to as the Commissioner.

(c) Doubts arising in the minds of the admeasures concerning decks to the hull, enclosures on or above the upper deck, shelter decks, method of procedure, etc., shall be submitted to the Commissioner for his decision, and shall be accompanied by blueprints or sketches of the spaces in question giving all the facts bearing on same. [28 F.R. 14553, Dec. 31, 1963, as amended by T.D. 66-57, 31 F.R. 4294, Mar. 11, 1966) § 2.2 What vessels are to be admeasured.

(a) Before any vessel is registered, enrolled and licensed, or licensed, or issued a certificate of record, her tonnages shall be ascertained by an officer of the customs as provided in these regulations.

(b) In the discretion of the Commissioner of Customs, a vessel not required by law to be admeasured may nevertheless be admeasured upon his own motion or upon application by the owner, a Federal or State agency, or a foreign government. (T.D. 67–69, 32 F.R. 3388, Mar. 1, 1967] § 2.3 Purpose for which measurements

are taken. (a) Tonnage measurements are taken for the purpose of ascertaining the internal capacity of measurable spaces.

(b) All measurements are to be taken in feet and fractions of feet, and all fractions of feet shall be expressed in decimals.

$ 2.4 Register ton.

A register ton is a volume of 100 cubic feet. $ 2.5 Gross register tonnage.

(a) The gross tonnage, referred to in this part is the gross register tonnage; that is, the gross tonnage exclusive of all permissible exempted spaces. Under the provisions of § 2.87(b), a vessel may have two gross tonnages. The higher gross tonnage is applicable when a tonnage mark which is placed and displayed on the side of the vessel is submerged and the lower is applicable when the tonnage mark is not submerged.

(b) Except in the case of a vessel which is measured under the provisions of $$ 2.80 through 2.100, or under the provisions of $ $ 2.101 through 2.104, the gross register tonnage of a vessel shall consist of the following items:

(1) The cubic capacity below the tonnage deck, excluding exemptible water-ballast spaces within the measurable portion of the vessel;

(2) The cubic capacity of each between-deck space above the tonnage deck;

(3 The bic capacity of the permanent closed-in spaces on the upper deck available for cargo or stores, or for the accommodation of passengers and/or crew;

(4) All permanent closed-in spaces situated elsewhere available for cargo or stores, or for the accommodation of the crew, or for the charts, except cabins or staterooms for passengers, constructed entirely above the first deck which is not a deck to the hull;

(5) The excess of hatchways.

(c) The gross tonnage of a vessel measured under the provisions of $$ 2.80 through 2.100 shall be determined as provided by $ 2.86 (a).

(d) The gross tonnage of a vessel measured under the provisions of $ $ 2.101 through 2.104 shall be determined as provided by $ 2.103. [T.D. 66-57, 31 F.R. 4294, Mar. 11, 1966, as amended by T.D. 67–69, 32 F.R. 3388, Mar. 1, 1967] § 2.6 Net register tonnage.

(a) The tonnage of a vessel remaining after the authorized deductions have

been made from the gross register tonnage shall be deemed the net register tonnage. Under the provisions of 2.8T (b) a vessel may have two net tonnages. The higher net tonnage is applicable when a tonnage mark which is placed and displayed on the side of the vessel is submerged and the lower is applicable when the tonnage mark is not submerged.

(b) In ascertaining the net tonnage, no space may be deducted unless it has previously been included in the gross tonnage.

(c) The net tonnage of a vessel measured under the provisions of $ $ 2.101 through 2.104 shall be determined as provided by $ 2.104. [28 F.R. 14553, Dec. 31, 1963, as amended by T.D. 66–57, 31 F.R. 4295, Mar. 11, 1966, T.D. 67–69, 32 F.R. 3389, Mar. 1, 1967] $ 2.7 The marine document.

(a) The marine document of every vessel except one admeasured under the provisions of $ $ 2.101 through 2.104 shall show the date and place of build, the register length, breadth, depth, and the height of the upper deck to the hull above the tonnage deck; if applicable, the depth (Ds) and the length (Lt) used with the tonnage mark table and the distances to the tonnage mark from the line of the upper deck and from the molded line or equivalent of the second deck; the number of decks and masts; build as to her stem and stern; capacity under the tonnage deck, that of the between decks, and also separately, permanently enclosed spaces on or above the upper deck to the hull required to be included in the gross tonnage, and the omitted spaces, whether open or closedin, on, above, or below the upper deck; the gross tonnage or tonnages; items of deduction; and the net tonnage or tonnages.

(b) The marine document of every vessel admeasured under the provisions of $ $ 2.101 through 2.104 shall show the date and place of build, the register length, breadth, and depth, and the gross and net tonnages. [T.D. 66-57, 31 F.R. 4295, Mar. 11, 1966, as amended by T.D. 67–69, 32 F.R. 3889, Mar. 1, 1967]

§ 2.8 Application for measurement.

The builder of a new vessel which is to be admeasured, the person having supervision of changes or alterations, or both, affecting a vessel's register tonnage, and the owner of a vessel who elects to have her admeasured under the provisions of $ $ 2.101 through 2.104 or who, having had the vessel so admeasured, elects or is required to have her admeasured under the appropriate provisions of $ $ 2.11 through 2.100, shall apply in writing for admeasurement or tonnage adjustment, as the case may be, to the district director of customs for the district where the vessel is located. Except in the case of admeasurement under $ $ 2.101 through 2.104, application should be made in time to permit admeasurement before cargo or ballast is taken on, and in case of a new vessel, before boilers or engines are installed or compartments partitioned off. The application shall state the name and the oficial number of the vessel, if any, the name, address, and telephone number of the owner, the exact location of the vessel, the date and place of build and the builder's name, the rig, and model or other identifying numbers. [T.D. 67–69, 32 F.R. 3389, Mar. 1, 1967) $ 2.9 Drawings.

(a) Plans to be filed. In order to facilitate admeasurement, there shall be furnished by the vessel's builder or owner to the collector of customs for the district in which the vessel will be admeasured, either with the application for admeasurement or a reasonable period before admeasurement is scheduled to commence, blueprints or drawings of the following:

(1) A drawing of the cross section in which is shown the construction of the double bottom, if there be one;

(2) An inboard view of the longitudinal section, showing the double bottom, its use or uses, if existing, otherwise the floors, the compartments for water ballast, other than the double bottom, the decks, the superstructures, hatchways, etc.;

(3) Deck plans showing the arrangement and uses of different compartments and deductible spaces;

(4) Drawings showing the arrangement of the engine, boiler, and fuel compartments; and

(5) A tonnage plan showing half breadths of the sections at the points of division of the tonnage length of the vessel into a certain number of equal parts in accordance with the rules for the measurement of spaces under the tonnage deck. The scale or scales of these drawings are to be indicated thereon.

The collector of customs is to be advised of any subsequent changes in the vessel and furnished copies of the corrected plans, or a statement of such changes.

If there are no blueprints or drawings available and if the collector is satisfied that it is impracticable to require such plans to be prepared and made available, considering the size and nature of the vessel as well as the cost and time involved, the vessel shall be measured without requiring their production.

(b) Sketches. When blueprints or drawings are not produced, necessary rough sketches may be made during the course of admeasurement showing the inboard profile, the midship cross-section, the hull and deck arrangements, and related matters, recording any necessary dimensions and showing details of important features such as the depth of side and bottom frames or floor timbers; the dimensions, location, and use of structures and hull spaces; and the thickness of the inner and outer skin. Such rough sketches shall be retained and filed with the other admeasurement papers. The rough sketches made shall not be redrawn to scale unless the admeasurer is satisfied that such action is necessary to insure that accurate dimensions have been lifted, to avoid the necessity for readmeasurement, or to insure against a claim of error which may reasonably be expected to be made in a particular case by the owner or agent. § 2.10 Measurements to be taken at an

early stage. Admeasurement should begin as soon as the vessel is sufficiently advanced in construction to permit its being done, usually when the decks are laid, the hold cleared of encumbrances to admit the required depths and breadths being properly taken; before the engine and boilers are installed and accommodations are partitioned off. § 2.11 Uniform system required.

(a) The following directions are given showing the progressive steps to be followed in the process of admeasurement. It is important not only that the rules be followed, but that required measurements be taken and calculations made in a uniform and correct manner that one general system may prevail throughout the service respecting this subject.

(b) Measurements taken aboard are to be recorded in the "Memorandum of Dimensions" known as Form 1413.

(c) These directions do not apply to admeasurement under the provisions of $ $ 2.101 through 2.104. [28 F.R. 14553, Dec. 31, 1963, as amended by T.D. 67–69, 32 F.R. 3389, Mar. 1, 1967) § 2.13 Measuring instruments.

(a) The measurements should be made with a waterproof tape, graduated into feet and tenths of a foot, and as nearly inelastic as possible.

(b) Sliding rods which are of three sizes: One 3 feet long for taking depths from 3 to 5.8 feet; another 6 feet long for taking depths from 6 to 11 feet, or, with the extension piece attached, to 16 feet; and a third one 11 feet long for taking depths from 11 to 21 feet, or, with the extension piece attached, to 26 feet. The movable or index rod in each has an arrow index traversing a decimal scale on the fixed rod. Greater depths may be taken by inserting into the ends of the index rods, an extension piece, provided with sockets for this purpose one or more joints of lift rods described below:

The fixed rod is graduated in feet (in red) and tenths and half-tenths (in black). and when the ends of the rods are well together the arrow on the index rod points to the figure indicating the constant length of the fixed rod, and as the index rod is moved up the arrow indicates the length from the upper end thereof to the lower end of the fixed rod. Bear in mind, bowever, that when you use any of the attachments referred to above you must add to the reading on the fixed rod the net length of the attachment used; e. g., 11 the 6-foot

rod is extended to its limit, 11 feet, which is reached when the arrow on the index rod is fair with the upper end of the fixed rod, and the extension piece is attached, which is done by slipping the bands on the lower end of it over the upper end of the index rod until the upper edge of the upper band is fair with the upper end of the index rod, and by fastening (on the groove side of the index rod) with set screws in the said bands, the length will not be 11 feet, as shown by the reading, but 16 feet, the reading plus the increment due to the attachment (11 feet + 5 feet). This increment may be further increased by inserting into the end of the extension piece one or more joints of lift rods, each of which is about 3.95 feet when adjusted.

At the station of the area to be measured in single-deck vessels the rod is to be placed on the ceiling, or floor beam or timber when no ceiling is present, alongside the keelson or line of the keel, perpendicular or square thereto, and also parallel to the middle longitudinal plane of the ship, and forced up firmly under the deck and fixed in such position by the set screws; from the depths thus found take one-third of the round or one-half of the pitch of beam to get the depth of the area.

The depth of an area taken as above is to be divided into the required number of equal parts. (See $ 2.29 (d).) With the rod fixed in position as above, set off on it from its lower end one of these equal parts, or common interval between the breadths, using white or other colored chalk or material that will make a visible mark, which gives the position of the first breadth above the bottom breadth, and from this when the rod is taken down the positions of the remaining breadths are to be set off at the said common interval.

The positions of all the breadths being thus severally marked on the rod, it is then to be set up again and firmly fixed or held in position, and the breadths may be readily 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.

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