Sec.  80.1175   Scope of communications of on-board stations.

   (a) On-board stations communicate:

   (1) With other units of the same station for operational communications on
   the ship.

   (2) With on-board stations of another ship or shore facility to aid in oil
   pollution prevention during the transfer of 250 or more barrels of oil.

   (3) With other units of the same station in the immediate vicinity of the
   ship  for operational communications related to docking, life boat and
   emergency drills or in the maneuvering of cargo barges and lighters.

   (b) An on-board station may communicate with a station in the Business Radio
   Service  operating  on the same frequency when the vessel on which the
   on-board  station is installed is alongside the dock or cargo handling
   facility.