Ofcom | What type of Maritime Licence do I need?
Coastal Station Radio (Marina)
This licence is available to those who operate sailing or yacht clubs, marinas and similar organisations and covers communication concerning the movement and berthing of pleasure crafts and the control of races.
Three channels are available.
Channels M and M2 (157.850 and 161.425 MHz) are simplex channels. As these channels are not international channels, users need not hold a Maritime Radio Operators' Certificate of Competence and Authority to Operate
Channel 80 is a duplex channel (157.025MHz to transmit on ship, 161.625MHz to transmit on coastal station). Channel 80 is an international channel and its use must be by, or under the supervision of a holder of a Maritime Radio Operator's Certificate and Authority to Operate.
If you wish to transmit from a ship on Channel 80, you must be covered by a Ship Radio Licence or Ship Portable Radio Licence and hold a Maritime Radio Operators Certificate (or be under the direct supervision of someone who does).