StacksVerified U.S. regulatory reference

47 CFR §80.1181

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)On-board stations must identify when:
    1. (1)The vessel is within 32 km (20 miles) of any coastline; or
    2. (2)The communications are likely to be received aboard another vessel.
  2. (b)Identification, when required, must be:
    1. (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. (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.”