Coast Guard, DOT § 160.035–6
161.006 of this subchapter Q (Specifica- searchlight, and the operator of the tions). The engine shall be fitted with a equipment. The top and sides of the marine type generator or alternator in- radio cabin shall be watertight with sulated as required by AIEE rules for the exception of the door which need marine service capable of charging the not be watertight but shall be at least batteries used for the searchlight as weathertight. The installation of the well as the starting batteries, if fitted. radio cabin shall take into consider- The battery box shall be in accordance ation the concentration of weight in with paragraph (a)(5) of this section. this area. (d) Steel motor-propelled lifeboats with (3) The searchlight shall be of an ap- radio cabin and searchlight (Class 3). (1) proved type constructed in accordance The engine shall be a reliable, marine with specification Subpart 161.006 of type and shall be in accordance with this subchapter and shall be securely paragraph (a)(5)(i) of this section. The mounted on top of the radio cabin. engine shall be fitted with a marine (4) The batteries shall be installed in type generator or alternator insulated a box securely fastened inside the radio as required by AIEE rules for marine cabin. The battery box shall be in ac- service, capable of charging the bat- cordance with paragraph (a)(5) of this teries used for the radio and search- section. light as well as the starting battery, if [CGFR 65–9, 30 FR 11467, Sept. 8, 1965, as fitted. amended by CGD 72–133R, 37 FR 17039, Aug. (2) The radio and source of power for 24, 1972; CGD 73–116R, 39 FR 12747, Apr. 8, the radio and the searchlight shall be 1974] housed and protected from the ele- ments by a suitable radio cabin. The § 160.035–6 Construction of aluminum entire installation shall comply with oar-, hand-, and motor-propelled the requirements of the Federal Com- lifeboats. munications Commission, Rules Gov- (a) General. Aluminum lifeboats shall erning Stations on Shipboard in the comply with the general requirements Maritime Services. The radio cabin for the construction and arrangement shall be of a size to contain the radio of steel lifeboats unless otherwise spec- and source of power for the radio and ified.
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(b) Materials. (1) Plating for shell, air tion, fastenings, methods of attach- tanks, etc., shall be as shown in Table ment of component parts, and other 160.035–6. specific construction details may be (c) Welding. (1) Welding may be sub- varied by the builder in order to stituted for riveting in the following produce a structurally sound boat locations: Hoist plate to keel, dis- meeting in every respect recognized engaging gear grace plate to stem and standards of first class construction sternpost, rudder attachment fitting to and one which will satisfactorily meet the sternpost, and the propeller shaft the performance requirements set forth stern tube to the sternpost. When using in this subpart. 6061–T6 aluminum, the welded area is (2) Fibrous glass reinforced plastic to be heat-treated and checked by X- lifeboats may be of the following cat- ray to assure a satisfactory weld. When egories of hull construction: using 5086–H 112 aluminum, the welded area is to be checked by a non- A—Single piece, outer hull construction. destructive test method such as X-ray, B—Two piece, outer hull construction. C—Single piece, inner hull construction. ultrasonic waves or fluorescent mate- D—Two piece, inner hull construction. rials, to assure a satisfactory weld. E—Multi-piece, inner hull construction. Other methods of checking aluminum welds will be given separate consider- (b) Specific requirements—(1) Resin. ation. The welding shall be performed The resin used shall be of the fire re- by a welder qualified by the U.S. Coast tardant, nonair inhibited-type con- Guard, American Bureau of Shipping, forming to Class A of Military Speci- or U.S. Navy Department, and only fication MIL–R–21607 and Grade A, suitable electrodes shall be used. De- Class O of Military Specification MIL– tails of the joints shall be indicated on R–7575, including tests after 1 year’s the construction drawings submitted weathering. In addition, the test panels for approval. shall be tested for continued conform- (d) Dissimilar metals. (1) Where in the ance with Military Specification MIL– construction of aluminum lifeboats the R–21607. All tests, including weathering use of dissimilar metals are employed of samples, shall be accomplished by an such as, the installation of the me- independent laboratory. Complete cer- chanical disengaging gear, hand propel- tification by the independent labora- ling gear, or engine, suitable insulation tory with test data shall be submitted between the aluminum and these met- to Coast Guard (G–MSE) for accept- als shall be used. Porous or absorbent ance. Class A resin shall be fire retard- materials shall not be used as insu- ant without additives. Class B resins lating materials. Only non-porous ma- will be given consideration upon re- terials such as plastics, rubber or neo- quest. Class B resin shall be fire retard- prene base compounds, or micarta shall ant with additives and shall meet the be used. Other suitable material will be same test requirements as that for given separate consideration. Fas- Class A resins. When Class B resin is teners used in joining dissimilar met- used for the prototype lifeboat, addi- als together shall be of the type that tives for fire retardancy shall not be will minimize corrosion. used in order to obtain a translucent laminate for inspection purposes. This [CGFR 65–9, 30 FR 11467, Sept. 8, 1965, as amended by CGD 95–028, 62 FR 51213, Sept. 30, prototype test lifeboat will not be 1997] stamped approved, nor will it be ac- ceptable for merchant vessels. Which- § 160.035–8 Construction of fibrous ever class of resin the manufacturer de- glass reinforced plastic (F.R.P.), cides to use for his prototype lifeboat, oar-, hand-, and motor-propelled shall be used in his production life- lifeboats. boats. A note to this effect shall be in- (a) General requirements. (1) Plastic cluded in his specifications and draw- lifeboats shall comply with the general ings for this particular size and type requirements for the construction and lifeboat. arrangement of steel lifeboats, except (2) Glass reinforcement. The glass rein- that unless otherwise specified, mate- forcement used shall have good lami- rials, scantlings, methods of construc- nated wet strength retention and shall
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