47 C.F.R. § 80.917 Reserve power supply.
Title 47 - Telecommunication
(a) A vessel of more than 100 gross tons the keel of which was laid after March 1, 1957, must have a reserve power supply located on the same deck as the main wheel house or at least one deck above the vessel's main deck, unless the main power supply is so situated. (b) The reserve power supply must be independent of the ship's propulsion and of any other electrical system, and be sufficient to simulataneously energize the radiotelephone transmitter at its required output power, and the receiver. The reserve power supply must be available for use at all times. (c) When the reserve power supply consists of batteries, they must be installed as high above the bilge as practicable, secured against shifting with motion of the vessel, and accessible with not less than 26 cm (10 in.) head room. (d) The reserve power supply must be located as near the required transmitter and receiver as practicable. (e) All reserve power supply circuits must be protected from overloads. (f) Means must be provided for charging any storage batteries used as a reserve power supply for the required radiotelephone installation. There must be a device which will give continuous indication of the rate and polarity of the charging current during charging. (g) The cooling system of each internal combustion engine used as a part of the reserve power supply must be adequately treated to prevent freezing or overheating consistent with the season and route to be travelled by the particular vessel involved. [51 FR 31213, Sept. 2, 1986, as amended at 58 FR 44954, Aug. 25, 1993]
Title 47: Telecommunication
PART 80—STATIONS IN THE MARITIME SERVICES
Subpart S—Compulsory Radiotelephone Installations for Small Passenger Boats
§ 80.917 Reserve power supply.
