2. All vessels not over 65 65 feet in length carrying 1. All vessels carrying more 2. All other vessels carrying b. Documented cargo All vessels carrying more All vessels carrying passengers for hire. TABLE 151.01-10 (f)-Continued Classes of vessels (including motorboats) examined or inspected under various Coast Guard regulations 1 Where length is used in this table it means the length measured from end to end 2 Subchapters E (Load Lines), F (Marine Engineering), J (Electrical Engineering), Subchapter H (Passenger Vessels) of this chapter covers only those vessels of 100 Vessels covered by Subchapter H (Passenger Vessels) or I (Cargo and Miscel- Column 8 All tank barges 11 carrying certain liquids and lique- All tank barges 11 ments of Subchapter D (Tank Vessels) in addition to the requirements of Subchapter 7 The meaning of the term "passenger" is as defined in the Act of May 10, 1956 Boilers and machinery are subject to examination on vessels over 40 feet in length. 10 Bulk dangerous cargoes are cargoes specified in Table 151.01-10(b) of § 30.25-5 of this chapter. 11 For manned tank barges see § 151.01-10(e). (e) Manned barges which carry or intend to carry in bulk the cargoes specified in Table 151.01-10(b) will be considered individually by the Commandant and may be required to meet the requirements of this subchapter and of Subchapter D (Tank Vessels) or I (Cargo and Miscellaneous Vessels) of this chapter as applicable. (f) This subchapter shall be applicable to all unmanned barges indicated in column 8 of Table 151.01-10(f). [CGFR 70-10, 35 F.R. 3714, Feb. 25, 1970; 35 F.R. 6431, Apr. 22, 1970] (a) Any liquid or liquefied gas, which meets the definitions referred to in § 151.01-1 and is not named in Table 151.01-10(b) or Table 151.01–10(d) shall not be transported in bulk in a manned or unmanned tank barge without the prior specific approval of the Commandant. (b) Mixtures or blends of two or more cargoes, one or more of which appears in Table 151.01-10(b), will be treated as though they were new products and specific approval of the Commandant must be obtained prior to undertaking their transportation. (c) Mixtures or blends of two or more cargoes appearing in Table 151.01-10 (d) may be treated as though that mixture were included on the list and may be transported under the provisions of Subchapter D (Tank Vessels) of this chapter. § 151.01-20 Use of minimum require ments. (a) The minimum requirements governing transportation of any liquid or liquefied gas listed in Table 151.01-10(b) are set forth in this part when such substances are carried in bulk in unmanned tank barges. (b) Before any liquid or liquefied gas listed in Table 151.01-10(b) may be carried in an unmanned tank barge, the certificate of inspection issued to such barge shall be appropriately endorsed to show approval to transport such cargo. § 151.01-25 Existing barges. (a) Except as provided in paragraph (c) of this section, barges certified for, or used within the previous 2 years prior to the effective date of this regulation, or barges equivalent to such barges, for the transportation of any cargo regulated by this subchapter which do not meet the specific requirements herein, may be continued in service subject to the following conditions: (1) Venting, gaging, and all operating requirements shall be met within a 1-year period subsequent to the effective date. (2) All other requirements shall be met within a 2-year period subsequent to the effective date. (b) If an existing barge, which has been designed to carry or has regularly been carrying one or more of the cargoes regulated by this subchapter, is found to be so arranged or outfitted that conversion to bring it into compliance with any or all of the requirements of this subchapter is impractical or impossible, the Commandant, upon application, may review the plans of the barge to determine if it is suitable and safe for the cargoes to be transported. (c) Except for operating requirements, barges constructed and certificated for the transportation of any cargo for which specific regulations existed, in Parts 36, 38, 39, 40, and 98 of this chapter at the time of their construction or conversion, may continue and will be certificated to operate without the requirement that they comply with the provisions of Subchapter O of this subchapter. § 151.01-30 Effective date. (a) The regulations in this subchapter are effective on and after June 1, 1970. However, amendments, revisions, or additions shall become effective ninety (90) days after the date of publication in the FEDERAL REGISTER unless the Commandant shall fix a different time. (b) The regulations in this subchapter are not retroactive in effect unless specifically made so at the time the regulations are issued. Changes in specification requirements of articles of equipment, or materials used in construction of tank barges, shall not apply to such items which have been passed as satisfactory until replacement shall become necessary, unless a specific finding is made that such equipment or materials used is unsafe or hazardous and has to be removed from tank barges. Subpart 151.02-Equivalents § 151.02-1 Conditions under which equivalents may be used. (a) Where in this part it is provided that a particular fitting, material, appliance, apparatus, or equipment, or type thereof, shall be fitted or carried in a vessel, or that any particular provision shall be made or arrangement including cargo segregation shall be adopted, the Commandant may accept in subtitution therefor any other fitting, material, apparatus or equipment, or type thereof, or any other provision or arrangement. However, the Commandant shall be satisfied by suitable evidence that the fitting, material, appliance, apparatus, or equipment, or the type thereof, or the provision or arrangement shall be at least as effective as that specified in this part. (b) In any case where it is shown to the satisfaction of the Commandant that the use of any particular equipment, apparatus, or arrangement not specifically required by law is unreasonable or impracticable, the Commandant may permit the use of alternate equipment apparatus, or arrangement to such an extent and upon such conditions as will insure, to his satisfaction, a degree of safety consistent with the minimum standards set forth in this part. § 151.02-5 Design of unmanned barges. (a) In order not to inhibit design and application, the Commandant may approve vessels of novel design, both new and for conversion, after it is shown to his satisfaction that such a vessel is at least as safe as any vessel which meets the standards required by this part. Subpart 151.03-Definitions § 151.03-1 Definitions of terms. Certain terms used in the regulations in this subchapter are defined in this subpart. § 151.03-3 Angle of down flooding. The angle of heel of the vessel at which any opening in the hull not provided with a water tight closure would be immersed. § 151.03-5 Approved. This term refers to the atmosphere within a cargo tank and the spaces adjacent to the tank or spaces in which cargo is handled. § 151.03-21 Filling density. The ratio, expressed as a percentage, of the weight of cargo that may be loaded into a tank compared to the weight of water that the tank will hold at 60° F. The weight of a gallon of water at 60° F. in air shall be 8.32828 pounds. § 151.03-23 Flame arrestor. Any device or assembly of cellular, tubular, pressure or other type used for preventing the passage of flames into enclosed spaces. § 151.03-25 Flame screen. A fitted single screen of corrosionresistant wire of at least 30 by 30 mesh, or two fitted screens, both of corrosionresistant wire, of at least 20 by 20 mesh spaced not less than one-half inch or more than 11⁄2 inches apart. § 151.03-27 Gas free. Free from dangerous concentrations of flammable or toxic gases. § 151.03-29 Great Lakes. A designation for all vessels in Great Lakes service. § 151.03-31 Headquarters. The Office of the Commandant, U.S. Coast Guard, Washington, D.C. 20591. § 151.03-33 Lakes, bays, and sounds. A designation for all vessels navigating the waters of any of the lakes, bays, or sounds other than the waters of the Great Lakes. § 151.03-35 Limiting draft. Maximum allowable draft to which a barge may be loaded. Limiting draft is a function of hull type and cargo specific gravity. A barge may be assigned different limiting drafts for different hull types or within one hull type for different specific gravities. § 151.03-37 Maximum allowable working pressure. The maximum allowable working pressure shall be as defined in section 8 of the ASME Boiler and Pressure Vessel Code. A designation for all vessels normally navigating the waters of any ocean or the Gulf of Mexico more than 20 nautical miles offshore. § 151.03-41 Officer in Charge, Marine Inspection. Any person from the civilian or military branch of the Coast Guard designated as such by the Commandant and who, under the superintendence and direction of the Coast Guard District Commander, is in charge of an inspection zone for the performance of duties with respect to the enforcement and administration of title 52 R.S., acts amendatory thereof or supplemental thereto, and rules and regulations thereunder. § 151.04-1 Certificate of inspection. (a) A certificate of inspection is required for every unmanned tank barge subject to the requirements in this subchapter. A certificate of inspection shall be issued to the barge or to its owners by the Officer in Charge, Marine Inspection, if the barge is found to comply with applicable inspection laws and the regulations in this chapter. (b) The certificate of inspection shall be endorsed with respect to the waters over which the barge may be operated. (c) The certificate shall be endorsed describing the cargoes by name as given in Table 151.01-10(b) or as specifically approved by the Commandant. No other dangerous cargo as defined in 151.01-1 shall be carried. Certificates shall specify maximum cargo weight (short tons), maximum density (pounds per gallon) and any operating limitations and a limiting draft. § 151.04-2 Inspection required. (a) Every unmanned tank barge subject to the regulations in this subchapter shall be inspected biennially. More frequent inspections may be required, if |