Can you legally and effectively use a marine VHF radio on land?
I have a couple of handheld VHF radios for my boat. When we anchor, my wife takes one ashore to the shops so we can stay in touch. A friend told me this is illegal and won't work well anyway. Is he right?
Answer
Legally, you cannot use a marine VHF radio on land for general communication, as your Ship Radio Licence and Short Range Certificate (SRC) only permit transmission from a waterborne vessel. Technically, while the radio will physically transmit, the line of sight marine VHF signal is severely blocked by buildings and terrain, reducing a 5-watt handheld's range to a mile or less.
The Strict Legal Position
Marine VHF frequencies (156.000 to 162.025 MHz) are heavily regulated and ring fenced by international maritime law. In the UK, Ofcom issues two main types of licence for boat owners: a Ship Radio Licence for fixed sets and a Ship Portable Radio Licence for handhelds. Both explicitly state that the equipment is licensed for use on a vessel.
If you take a standard handheld, like an Icom IC-M25 or Standard Horizon HX890, into a supermarket or a pub to call your boat on Channel 08, you commit an offence under the Wireless Telegraphy Act. Authorities actively monitor these frequencies to prevent interference with commercial shipping and Coastguard operations. Maximum penalties for misuse include equipment seizure and fines running into thousands of pounds.
Why the Signal Fails Ashore
Marine VHF relies on line of sight propagation. Over open water, there are no obstacles. A 25W fixed radio with a 1.5-metre whip antenna at the top of a 15-metre mast will comfortably reach the horizon, hitting targets 15 to 20 miles away. Even a 5W handheld held two metres above the deck can achieve 3 to 5 miles over flat water.
Land is a different environment. The moment you step ashore, the surroundings turn hostile to VHF waves. They do not bend around corners or penetrate dense objects well. If you attempt to transmit from a town high street to an anchorage, the signal is instantly absorbed and reflected by:
- Concrete and brick buildings
- Hills, cliffs and earth banks
- Dense, wet foliage in woods
- Road traffic and metal structures
In a built up area, a 5W marine handheld will struggle to punch through a single row of dense buildings, limiting your usable range to a few hundred metres of broken, crackly audio.
Legal Transmissions From Land
You will hear people transmitting from the shore, but they hold specific stationary licences. These include: