47 CFR 80.1201 - Special provisions for cable-repair ship stations.
(a) A ship station may be authorized to use radio channels in the 285-315 kHz band in Region 1 and 285-325 kHz in any other region for cable repair radiodetermination purposes under the following conditions:
(2) The call sign used for the transmitter operating under the provisions of this section is the call sign of the ship station followed by the letters “BT” and the identifying number of the buoy.
(3) The buoy transmitter must be continuously monitored by a licensed radiotelegraph operator on board the cable repair ship station; and
(4) The transmitter must operate under the provisions in § 80.375(b).