{"data":{"id":"us/47-cfr-80.963","jurisdiction":"us","citation":"47 CFR 80.963","heading":"Main power supply.","body":"(a) A main power supply must be available at all times while the vessel is subject to the requirements of this subpart.\n(b) Means must be provided for charging any batteries used as a source of energy. A device which during charging of the batteries gives a continuous indication of charging current must be provided.","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 80—STATIONS IN THE MARITIME SERVICES","Subpart T—Radiotelephone Installation Required for Vessels on the Great Lakes"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"a097536dc1e1a98020bbd66301376f88b929600561d39a2132844fd488729d16","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-80.961","next":"us/47-cfr-80.965"},"notice":"GroundRules: Original legal text. Not legal advice."}