Module 4 - Channels & Frequencies
Marina, Port, and Local Channels
What you will learn
Match a marina, harbour or traffic-service call to its published local channel and operational purpose.
Marina and port channels are local service routes. Their numbers, coverage and permitted traffic depend on current assignments, so the call plan must name the station as well as the channel.
Ofcom describes UK marina coastal-station radio as supporting pleasure-craft movement, berthing and race control. It identifies M and M2 as UK simplex marina channels, while international coastal-station licensing supports port operations, ship movement and safety. That does not mean every marina monitors both M channels or that another published local channel can be ignored.
Ports, harbour authorities, locks, bridges and vessel traffic services may each publish a channel and reporting point. Use the current harbour guide, notice or station instruction, then keep the transmission limited to the operational purpose of that service.
Prepare the request before entering the call area: station called, vessel identity, position and intended movement. A correct channel cannot compensate for an unclear call, and a clear call on the wrong channel still reaches the wrong service.
Separate a marina berth request from port movement control
The local guide lists one station for marina berths and another for harbour traffic instructions.
1. Choose the service
Decide whether you need a berth allocation or a movement instruction before selecting the channel.
2. Use the published route
Call the named station on its current published channel at the stated reporting point.
3. Read back
Repeat critical berth, movement or channel-change information and keep the exchange concise.
Sense check: If the called station and requested service do not match, the channel plan is incomplete even when the number is correct.
Common mistake or limitation
- Assuming every UK marina uses the same channel because M and M2 exist as national marina allocations.
- Using a port operations channel for social traffic or a berth request the station does not handle.
- Relying on an old passage-plan note after a current local notice has changed the reporting route.
Recap
- Tie the channel to the named station, service and current source.
- M and M2 are UK marina simplex allocations, not proof that every marina monitors both.
- Keep port and marina traffic operational, brief and correctly identified.
Optional quick check
Section 6 of 9
A harbour guide lists separate channels for marina berthing and vessel movement. Which should you call for permission to enter a controlled fairway?
Sources and factual review
Reviewed 20 August 2026 - Compass Revision editorial review.
Continue studying Channels & Frequencies
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