Sec.  80.1015   Power supply.

   (a) There must be readily available for use under normal load conditions, a
   power supply sufficient to simultaneously energize the bridge-to-bridge
   transmitter at its required antenna power, and the bridge-to-bridge
   receiver. Under this load condition the voltage of the power supply at the
   power input terminals of the bridge-to-bridge radiotelephone installation
   must not deviate from its rated voltage by more than 10 percent on vessels
   completed on or after March 1, 1957, nor by more than 15 percent on vessels
   completed before that date.

   (b) When the power supply for a nonportable bridge-to-bridge radiotelephone
   installation consists of or includes 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.

   (c) Means must be provided for adequately charging any rechargeable
   batteries used in the vessel's bridge-to-bridge radiotelephone installation.
   There must be provided a device which will give a continuous indication of
   the charging current during charging.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  58 FR 44954 , Aug. 25, 1993]