47 CFR § 80.963 - Main power supply.

---
identifier: "/us/cfr/t47/s80.963"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 80.963 - Main power supply."
title_number: 47
title_name: "Telecommunication"
section_number: "80.963"
section_name: "Main power supply."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "D"
subchapter_name: "SAFETY AND SPECIAL RADIO SERVICES"
part_number: "80"
part_name: "STATIONS IN THE MARITIME SERVICES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377."
regulatory_source: "51 FR 31213, Sept. 2, 1986, unless otherwise noted."
cfr_part: "80"
---


# 80.963 Main power supply.

(a) A main power supply must be available at all times while the vessel is subject to the requirements of this subpart.

(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.