47 CFR Ch. I (10–1–11 Edition)

§ 80.921 47 CFR Ch. I (10–1–11 Edition)

§ 80.921 Proof of capacity. § 80.925 Electric light. (a) When directed by a representative (a) If the vessel is navigated at night of the Commission the vessel must an electric light or dial lights which prove by demonstration as prescribed clearly illuminate the operating con- in paragraphs (b), (c), (d) and (e) of this trols must be installed to provide illu- section, that the requirements of mination of the operating controls at § 80.919 are met. the principal operating position. (b) Proof of the ability of a storage (b) The electric light must be ener- battery used as a main or reserve gized from the main power supply and, power supply to operate over the 3- if a reserve power supply for the radio- hour period established by a discharge telephone installation is required, from test over the prescribed period of time, the reserve power supply. when supplying power at the voltage required for an electrical loss as pre- § 80.927 Antenna radio frequency indi- scribed by paragraph (d) of this section. cator. (c) When the required power supply The transmitter must be equipped consists of an engine-driven generator, with a device which provides visual in- proof of the adequacy of the engine fuel dication whenever the transmitter is supply to operate the unit over the 3- supplying power to the antenna. hour period of time may be established by using as a basis the fuel consump- § 80.929 Nameplate. tion during a 1 hour period when sup- A durable nameplate must be mount- plying power, at the voltage required ed on the required radiotelephone for operating an electrical load as pre- equipment. When the transmitter and scribed by paragraph (d) of this section. receiver comprise a single unit, one (d) In determining the required elec- nameplate is sufficient. The nameplate trical load the following formula must must show the name of the manufac- be used: turer and the type or model number. (1) One-half of the current of the required transmitter at its rated output § 80.931 Test of radiotelephone instal- power; plus lation. (2) Current of the required receiver; Unless normal use of the radio- plus telephone installation demonstrates (3) Current of electric light, if re- that the equipment is in proper oper- quired by § 80.925; plus ating condition, a test communication (4) The sum of the current of all on a required frequency in the 1605 to other loads the reserve power supply 27500 kHz band or the 156 to 162 MHz may provide in time of emergency. band must be made by a qualified oper- (e) At the conclusion of the test spec- ator each day the vessel is navigated. If ified in paragraphs (b) and (c) of this the equipment is not in proper oper- section, no part of the main or reserve ating condition, the master must be power supply must have an excessive promptly notified. temperature rise, nor must the specific gravity or voltage of any storage bat- [51 FR 31213, Sept. 2, 1986, as amended at 56 FR 19302, Apr. 26, 1991] tery be below the 90 percent discharge point. § 80.933 General small passenger vessel exemptions. § 80.923 Antenna system. (a) Subject U.S. vessels less than 50 An antenna must be provided in ac- gross tons which are navigated not cordance with the applicable require- more than 300 meters (1,000 feet) from ments of § 80.81 of this part which is as the nearest land at mean low tide are efficient as practicable for the trans- exempt from the provisions of title III, mission and reception of radio waves. part III of the Communications Act. The construction and installation of (b) All U.S. passenger vessels of less this antenna must insure proper emer- than 100 gross tons, not subject to the gency operation. radio provisions of the Safety Conven- [51 FR 31213, Sept. 2, 1986, as amended at 56 tion, are exempt from the radio- FR 19302, Apr. 26, 1991] telegraph provisions of Part II of Title

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