Sec. 80.830  Power supply for survival craft nonportable radiotelegraph 
          installation.

    (a) The power supply for the survival craft nonportable 
radiotelegraph installation must consist of a battery capable of 
operating the survival craft radiotelegraph installation for at least 6 
hours continuously under normal working conditions.
    (b) The battery may power equipment other than the radiotelegraph 
installation (except that it must not be used to supply power to any 
engine

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starting motor or ignition system) provided such additional use will not 
adversely affect the required capabilities of the battery. All circuits 
connected to the battery must be independently fused.
    (c) The battery must be kept charged at all times while at sea. The 
charging of the battery must not require its removal from the survival 
craft in which it is installed. The necessary charging equipment must 
not interfere with the launching of the survival craft, and must be 
easily and quickly removable. The charging circuit for the battery must 
be routed through the radiotelegraph operating room, and include a 
device located in the radiotelegraph operating room which will give 
continuous indication of the polarity and the rate of charge.
    (d) Installation must provide for charging of the battery by means 
of a generator on the survival craft engine.
    (e) Subject to approval of the United States Coast Guard, the 
battery must be mounted in a suitable container that will provide 
protection from salt water spray and also allow proper ventilation.