FCC License - Element 6

You need a commercial radio operator license to operate the following:

Ship radio stations if:

the vessel carries more than six passengers for hire; or

the radio operates on medium frequencies (MF) or high frequencies (HF); or

the ship sails to foreign ports; or

the ship station transmits radiotelegraphy; or

the ship is larger than 300 gross tons and is required by law to carry a radio station for safety purposes.

Aircraft radio stations, except those which operate only on very high frequencies (VHF) and do not make foreign flights.