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Vessels" respecting material and construction of hulls, boilers, and machinery, except as otherwise provided for by law and regulations in this chapter, shall be accepted as standard by the Coast Guard.

(b) The current standards established by the American Bureau of Shipping in effect at the time of construction of the vessel, or otherwise as applicable, shall be used. The book "Rules for Building and Classing Steel Vessels" is usually published annually and may be purchased from the American Bureau of Shipping, 45 Broad Street, New York 4, New York. These standards may be also examined at the office of the Commandant (M), U. S. Coast Guard, Washington, D. C., or at the office of any Coast Guard District Commander or Officer in Charge, Marine Inspection.

(c) The approved plans and certificate of the American Bureau of Shipping, or other recognized classification society for classed vessels, may be accepted by the Coast Guard as evidence of the structural efficiency of the hull and reliability of machinery of vessels subject to the regulations in this subchapter, except as otherwise provided for by laws and regulations in this chapter.

[CGFR 52-43, 17 F. R. 9295, Oct. 18, 1952]

§ 31.10-5 Inspection of new tank vessels-TB/ALL-(a) Plans. Triplicate copies of contract plans and specifications shall be forwarded to the Officer in Charge, Marine Inspection, in whose district the construction will take place, for submission to Headquarters for approval, but if the tank vessel is to be classed, such plans and specifications shall first be approved by a recognized classification society. If the plans and specifications are found to be in substantial agreement with the regulations in this chapter, they shall be approved, properly stamped and dated and distributed as follows: one set to owner or builder; one set to Officer in Charge. Marine Inspection, of the district in which the vessel is to be built; and one set shall be retained at Headquarters. If such plans and specifications are not approved, Headquarters shall notify the owner or builder promptly wherein they fail to comply with the regulations in this chapter.

(b) Inspection. During construction, and upon completion of each tank vessel, it shall be inspected by the Officer in

Charge, Marine Inspection, to determine whether it has been built in accordance with the approved plans and specifications, and, if so, a certificate of inspection endorsed as a permit for the carriage of inflammable or combustible liquids in bulk for the proper grade or grades of cargo shall be issued to the vessel or its owner.

(c) Certificate of class may be accepted. In the event such tank vessel is classed by the American Bureau of Shipping or other recognized classification society, the approved plans and certificates of such society may be accepted by the Coast Guard as evidence of the structural efficiency of the hull and reliability of machinery, except as otherwise provided for by law and the rules and regulations in this subchapter.

§ 31.10-10 Vessels converted to tank vessels-TB/ALL. The procedure for the inspection of vessels converted to tank vessels shall conform to the inspection for new tank vessels as called for in § 31.10-5 (b), and such vessels shall comply with the requirements of inspections for converted vessels as set forth in the regulations in this subchapter.

§ 31.10-15 Annual inspection—TB/ ALL. (a) The Officer in Charge, Marine Inspection, shall once in every year, at least, carefully inspect each tank vessel within his jurisdiction and shall satisfy himself that every such vessel so inspected is of a structure suitable for the carriage of inflammable and/or combustible liquids in bulk and for the proper grade or grades of such cargo in the service in which she is employed; and if he deems it expedient, he may direct the vessel to be put in motion, and may adopt any other suitable means to test her sufficiency and that of her equipment.

(b) If such inspection reveals deflciencies in the maintenance as called for by the regulations in this subchapter, such necessary repairs or improvements shall be made as may be ordered to comply herewith.

§ 31.10-20 Drydocking or hauling out-TB/ALL. (a) Each steel hull tank vessel shall be placed in drydock or on a slipway or hauled out for examination depending upon its service, as follows:

(1) Each tank vessel whose operations in salt-water service aggregate more than 6 months in a calendar year shall be drydocked or hauled out at least once each calendar year.

(2) Each tank vessel whose operations in salt-water service aggregate 6 months or less in a calendar ycar shall be drydocked or hauled out at least once in every 2 calendar years.

(3) Each tank ship used in fresh water service exclusively shall be drydocked or hauled out at least once in every 5 calendar years.

(4) Tank barges used in fresh water service exclusively need not be drydocked or hauled out during the first 5 calendar years after date of build, but shall be drydocked or hauled out between that time and the end of the tenth calendar year after date of build, and once in every 5 calendar years thereafter.

(b) Each wood hull tank vessel shall be placed in drydock or on a slipway, or hauled out for examination at least once every 4 years.

(c) Each tank vessel, irrespective of service which has not complied with these drydocking requirements, either because it was on voyage or was tied up, shall be drydocked or hauled out upon the completion of such voyage or before being placed in service.

(d) Whenever any tank vessel is placed in drydock or on a slipway or hauled out for repairs it shall be the duty of the master, owner, or agent to report the same, together with the nature of any repairs or alterations contemplated, to the Officer in Charge, Marine Inspection, of that zone, and if the condition or age of the vessel, in the judgment of the inspectors, renders an examination necessary, a thorough inspection shall be made by them to determine what is necessary to make such vessel seaworthy and come within the provisions of the regulations in this subchapter.

(e) Sea chests, sea valves, sea strainers and bilge injection valves shall be examined at the time of the drydockings required by paragraphs (a), (b), and (c) of this section and shall be opened examination up for internal when deemed necessary by the Officer in Charge, Marine Inspection.

[CGFR 50-31, 16 F. R. 1517, Feb. 14, 1951, as amended by CGFR 52-43, 17 F. R. 9295, Oct. 18, 1952]

§ 31.10-23 Examination of tail shaft— T/OC. The outboard shaft or shafts on every ocean or coastwise tank ship shall

be drawn for examination once at least

in every 3 years: Provided, That if the circumstances warrant it, the Coast Guard District Commander may extend this time to the next regular drydocking period, not to exceed 4 months: And provided further, That when it is shown that a vessel has had a long period of lay-up, the Coast Guard District Commander may grant an extension equal to the time the vessel has been out of commission, but in no case shall the extension exceed 1 year.

§ 31.10-25 Inspection covering repairs and alterations involving safety-TB/ ALL. No extensive alterations involving the safety of a tank vessel either in regard to hull or machinery shall be made without the approval of the Commandant. Before such alterations are carried out, copies of plans and specifications in triplicate for the work involved shall be forwarded to the Officer in Charge, Marine Inspection, in whose zone the repairs will be made, for submission to Headquarters for approval. If approved one set of the plans and specifications, properly stamped and dated, shall be returned to the owner or to the repair yard designated by the owner; one set to the Officer in Charge, Marine Inspection, who forwarded the plans and specifications to Headquarters; and one set shall be retained at Headquarters. If such plans and specifications are not approved, Headquarters shall promptly notify the owner or designated shipyard wherein they fail to comply with the regulations in this chapter. No extensive repairs to the hull or machinery which affect the safety of a vessel shall be made without the knowledge of the Officer in Charge, Marine Inspection.

§ 31.10-30 Stability test—TB/ALL. When the Officer in Charge, Marine Inspection, has reason to question the stability of any tank vessel under his jurisdiction, he shall require the owners of the tank vessel to make a stability test of such vessel.

[CGFR 52-43, 17 F. R. 9295, Oct. 18, 1952]

§ 31.10-31 Stability test s—T/OC. Each mechanically propelled tank ship of 500 gross tons and over, construction or conversion of which was started on or after November 19, 1952, shall be subjected to a stability test. A stability letter prepared by the Coast Guard and embodying the necessary instructions to insure maintenance of sufficient intact

stability at all times shall be posted under glass in the pilothouse. The Commandant may allow the stability test of a ship to be dispensed with provided basic stability data are available from the stability test of a sister ship and it is shown to the satisfaction of the Commandant that reliable stability information for the exempted ship can be obtained from such basic data.

[CGFR 52-43, 17 F. R. 9295, Oct. 18, 1952]

31.10-35 Permit to proceed to other ports for repairs-TB/ALL. The Officer in Charge, Marine Inspection, may issue a permit to proceed to another port for repairs, if in his judgment the vessel can proceed with safety. In the issuance of such a permit, the Officer in Charge, Marine Inspection, will state upon its face the conditions upon which it is granted and whether the vessel is to be allowed to carry freight or passengers. A vessel whose certificate of inspection has expired shall not be issued a permit to carry passengers while en route to another port for repairs.

8 31.10-40 Inspection during trial trip-T/ALL. On the trial trip of each new or converted tank ship, an inspector shall be present to observe from the standpoint of safety in the carriage of inflammable and/or combustible liquids in bulk, the operation of boilers, engines, steering gear, and auxiliaries; and if not satisfied with the performance of such boilers and machinery, appliances, and apparatus for stowage, he shall make such requirements as in his judgment will overcome any deficiencies which may have come under his observation.

§ 31.10-45 Inspection of crew accommodations-TB/ALL. Crew's quarters shall be inspected to determine their sanitary condition. The Officer in Charge, Marine Inspection, upon completing such inspection, shall notify the master or officer in charge of the vessel of his findings, which shall be entered in the vessel's log book.

SUBPART 31.15-MANNING OF TANK VESSELS

$31.15-1 Licensed officers and crews-TB/ALL. (a) The Officer in Charge, Marine Inspection, who inspects the vessel, shall make in the certificate of inspection for each tank vessel an entry of such complement of officers and/or crew as required by law and regulations in this subchapter, and which in the judgment of the Officer in Charge, Marine Inspection, will be necessary for

her safe operation. The complement may be changed from time to time by endorsement on such certificate by an Officer in Charge, Marine Inspection, by reason of change of conditions or employment.

(b) In all cases where a certificate of inspection does not require at least two licensed officers, the Officer in Charge. Marine Inspection, shall enter in the certificate of inspection issued to any manned tank vessel subject to the regulations in this subchapter the number of the crew required to be certificated as tankermen. If the total complement of a tank vessel is either one or two persons, only one such person need be a certificated tankerman. If the total complement exceeds two, only two such persons need be certificated tankermen.

§ 31.15-5 Tank barges-B/ALL. Tank barges need not be manned unless in the judgment of the Officer in Charge, Marine Inspection, such manning is necessary for the protection of life and property and for the safe operation of the vessel: Provided, however, That towing vessels, while towing barges which are not required to be manned, shall carry in the regular complement of the towing vessel and shall have on board at all times while towing, at least one licensed officer or certificated tankerman.

§ 31.15-10 Towing vessels may carry persons in addition to crew-B/LBR. (a) Towing vessels engaged in towing tank barges on the Great Lakes, inland waters, or rivers, may be authorized by the Coast Guard District Commander of the district to carry on board such number of persons in addition to its crew as shall be deemed necessary to carry on the legitimate business of such towing vessel or barge, not exceeding, however, one person to every net ton of the towing vessel.

(b) A Coast Guard District Commander granting a license to a vessel engaged in towing to carry persons in addition to its crew shall notify the Officer in Charge, Marine Inspection, in whose jurisdiction the vessel receiving the permit is engaged, and the Officer in Charge, Marine Inspection, shall keep a record of the same.

SUBPART 31.20—WATERS OPERATED OVER

§ 31.20-1 Waters-TB/ALL. The certificate of inspection shall show the waters over which the tank vessel is permitted to operate, such as: all waters;

oceans; coastwise; Great Lakes; bays, sounds, and lakes other than the Great Lakes; rivers; or inland waters tributary to the Gulf of Mexico.

SUBPART 31.25-LOAD LINES

§ 31.25-1 Load lines required-TB/ OCL. All tank vessels of 150 gross tons or over navigating the oceans, coastwise waters, and Great Lakes are subject to the regulations in Parts 43 to 45, inclusive, Subchapter E (Load Lines) of this chapter.

SUBPART 31.30-MARINE ENGINEERING § 31.30-1 Marine engineering regulations and material specifications— TB/ALL. All tank vessels are subject to the regulations contained in Parts 50 to 57, inclusive, Subchapter F (Marine Engineering) of this chapter, wherever applicable, except as such regulations are modified by the regulations in this subchapter for tank vessels.

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32-Special

Machinery, and Hull Require

32.40-5

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32.40-15

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Subpart 32.40-Accommodations

Crew

accommodations on tank ships of 100 gross tons or over constructed after January 1, 1938-T/ALL.

Crew accommodations on tank ships of less than 100 gross tons and manned tank barges constructed after January 1, 1938TB/ALL.

Crew accommodations on tank ships of 100 gross tons or over constructed after March 4, 1915, and prior to January 1, 1938T/ALL.

Crew accommodations

on tank

ships and manned tank barges not otherwise provided forTB/ALL.

Subpart 32.45-Electrical Installations

Application-TB/ALL.

General installation require

ments-TB/ALL.

32.45-10 Installations made during the Unlimited National EmergencyTB/ALL.

32.45-15 Location of storage batteries on tank vessels constructed after November 10, 1936-TB/ALL.

Subpart 32.50-Pumps, Piping, and Hose for Cargo Handling

32.50-1

32.50-5

Cargo pumps for tank vessels constructed on or after November 10, 1936-TB/ALL.

Cargo pump fittings and controls on tank vessels constructed on or after November 10, 1936-TB/ ALL.

32.50-10 Cargo pumps on tank vessels with independent cargo tanks which were constructed prior to November 10, 1936-TB/ALL.

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32.55-20

Venting of cargo tanks of tank ships constructed on or after July 1, 1951-T/ALL.

32.55-25 Venting of cargo tanks of tank barges constructed on or after July 1, 1951-B/ALL. 32.55-30 Venting of cargo tanks of tank vessels constructed between November 10, 1936, and July 1, 1951-TB/ALL.

32.55-35 Venting of cargo tanks on tank vessels constructed prior to November 10, 1936-TB/ALL.

32.55-40 Venting of cargo tanks fitted with inert-gas system-TB/ALL. 32.55-45 Venting of cofferdams of tank vessels constructed on or after November 10, 1936-TB/ALL.

Subpart 32.60-Hull Requirements for Tank Vessels Constructed on or After July 1, 1951 32.60-1 Scantlings, material, and work

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32.75-10 32.75-15

Cargo tanks-TB/ALL.

32.75-20

Electric bonding and grounding of
tanks-TB/ALL.

Hold spaces and bulkheads-TB/
ALL.

Subpart 32.80-Tank Barges Constructed of Materials Other Than Steel or Iron 32.80-1 General requirements-B/ALL.

AUTHORITY: $$ 32.01-1 to 32.80-1 issued under R. S. 4405, as amended. 4417a, as amended, 4462, as amended; 46 U. S. C. 375, 391a, 416. Interpret or apply sec. 5, 55 Stat. 244, 245, as amended; 50 U. S. C. App. 1275; E. O. 10402, 17 F. R. 9917; 3 CFR, 1952 Supp. SOURCE: $32.01-1 to 32.80-1 contained in CGFR 50-31, 16 F. R. 1518, Feb. 14, 1951. except as otherwise noted.

SUBPART 32.01-SAFETY REQUIREMENTS § 32.01-1 Means of escape-T/ALL. On all tank ships where the plans and arrangements will possibly permit, all

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