§  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]