C.F.R. » Title 47 » CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION › SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES › PART 80—STATIONS IN THE MARITIME SERVICES › Subpart S—Compulsory Radiotelephone Installations for Small Passenger Boats

47 C.F.R. § 80.919

Required capacity

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If either the main or reserve power supply includes batteries, these batteries must have sufficient reserve capacity to permit proper operation of the required transmitter and receiver for at least 3 hours under normal working conditions.