Station identification.

(a) On-board stations must identify when: (1) The vessel is within 32 km (20 miles) of any coastline; or (2) The communications are likely to be received aboard another vessel. (b) Identification, when required, must be: (1) Transmitted at the beginning and the end of a series of communications. Whenever communications are sustained for a period exceeding 15 minutes, station identification must be transmitted at intervals not exceeding 15 minutes. (2) In English and must include the name of the vessel, followed by a number or name designating the respective mobile unit, for example: “S.S. United States Mobile One, this is Mobile Two.” [51 FR 31213, Sept. 2, 1986, as amended at 58 FR 44954, Aug. 25, 1993]