Sec. 80.917 Reserve power supply.
(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]
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