VHF Marine Radio Guide: FCC Licensing, MMSI, and Choosing the Right Radio

A VHF marine radio is the one piece of safety equipment that reaches the Coast Guard, nearby vessels, bridges, and marinas with a single button. Two questions come up before almost every purchase: whether the radio needs an FCC license, and which type of radio to buy. For US recreational boaters in domestic waters, the licensing answer is usually no. For commercial vessels, ships on international voyages, and SOLAS ships, the answer is yes, along with specific equipment rules.

Do You Need a License to Operate a VHF Marine Radio?

Under the Telecommunications Act of 1996, US recreational boaters may operate a VHF marine radio, EPIRB, and marine radar without an FCC ship station license while they stay in domestic waters. The FCC calls this being "licensed by rule." The US Coast Guard Navigation Center sets out when that exemption ends in its guide to FCC license requirements.

Two practical details matter for boaters who do need a license. A ship station license, filed on FCC Form 605, is valid for 10 years and stays with the vessel owner rather than transferring with a sold boat. A Restricted Radiotelephone Operator Permit requires no exam and is valid for life.

MMSI numbers: a separate step

A Maritime Mobile Service Identity (MMSI) is the nine-digit number that identifies a radio in Digital Selective Calling (DSC) and AIS. An MMSI is not the same as a license.

• Boaters without an FCC license can get a free MMSI through authorized registrars such as BoatUS or Shine Micro, and those registrations are valid in US domestic waters only.
• Boaters with an FCC ship station license receive their MMSI with the license. Only FCC-issued MMSIs are visible to rescue agencies outside the United States.

Registration details such as vessel description and emergency contacts are not broadcast; the details sit in a database the Coast Guard uses during a distress response, so keeping them current matters.

VHF Radio Licensing for Commercial and SOLAS Vessels

Commercial vessels face equipment rules on top of licensing.

• The Bridge-to-Bridge Radiotelephone Act, at 33 CFR Part 26, requires a VHF radiotelephone on power-driven vessels of 20 meters or more, vessels of 100 gross tons or more carrying passengers for hire, towing vessels of 26 feet or more, and dredges working in or near channels. Those vessels must monitor Channel 13 in US waters.
• SOLAS ships carry a fixed GMDSS VHF with DSC on Channel 70 as part of their radio installation.
• SOLAS ships also carry portable two-way VHF radios for survival craft. Under 47 CFR 80.1095, passenger ships and cargo ships of 500 GT or more need at least three, and cargo ships of 300 to 500 GT need at least two.

Operating GMDSS equipment on a SOLAS ship also requires a GMDSS operator certificate. The ANS guide to GMDSS certification explains the GOC and ROC, and the GMDSS radio equipment inspection checklist covers what surveyors test.

Handheld vs Fixed-Mount VHF: Which Do You Need?

Range on VHF is mostly a matter of antenna height and transmit power. A fixed-mount radio wins on both, while a handheld wins on portability.

For most boats, the answer is both: a fixed-mount DSC radio as the primary set and a handheld as a backup that works when the main battery or antenna fails.

DSC and GMDSS-Compliant VHF Radios

Digital Selective Calling turns a VHF radio into a distress beacon. Pressing the red distress button transmits the vessel's MMSI, and its position if a GPS is connected, as a digital alert on Channel 70. Channel 70 is reserved for DSC data; voice is not permitted on it. A DSC radio without a registered MMSI and a GPS feed cannot send a complete alert, which is why both steps matter.

GMDSS-approved radios go further, with type approval to IMO performance standards for carriage on SOLAS ships. The Jotron TRON TR30 GMDSS VHF is a handheld two-way survival-craft radio that, according to Jotron, is the only GMDSS-approved handheld in production that floats without a buoyancy cover. The radio switches automatically between standard maritime channels and emergency simplex channels depending on which battery is connected. ANS stocks both the rechargeable and the primary lithium emergency battery. Passenger ships, MODUs, and Polar Code vessels that need aeronautical VHF for search and rescue coordination can add the TRON TR30 AIR.

Ships keeping a radio watch record it in a radio log book, and the Admiralty List of Radio Signals lists coast station and port VHF channels worldwide.

How to Use a VHF Radio: Channel Basics

US VHF channels are assigned by purpose. The key assignments, from the US Coast Guard channel list, are:

A standard call follows a simple pattern:

1. Listen first to make sure the channel is clear.
2. Call on Channel 16 or 9: the other vessel's name two or three times, then "this is" and the calling vessel's name.
3. Once answered, switch to a working channel such as 68 or 72.
4. Keep the exchange short and end with the vessel's name and "out."

For emergencies, "Mayday" is used for grave and imminent danger, "Pan-Pan" for urgency, and "Securité" for safety messages such as navigation warnings.

Shop GMDSS VHF Radios

A VHF radio is only as useful as its setup: the right license where required, a registered MMSI, a GPS connection for DSC, and a backup handheld. For SOLAS ships and commercial operators, ANS supplies GMDSS-approved survival-craft radios, batteries, and the radio publications that go with them.

Shop GMDSS VHF radios, starting with the Jotron TRON TR30, or contact ANS at +1 (954) 522-3321 or sales@amnautical.com.

Frequently Asked Questions

Do recreational boaters need an FCC license for VHF radio?

Not in US domestic waters. Since 1996, recreational boaters have been licensed by rule for VHF, EPIRB, and radar. A ship station license and an operator permit are needed when docking in foreign ports or communicating with foreign stations.

What is DSC on a VHF radio?

Digital Selective Calling sends digital alerts on Channel 70. Its distress button transmits the vessel's MMSI and, with a GPS connected, its position to the Coast Guard and nearby vessels.

Do I need a separate MMSI number?

Yes, to use DSC. Recreational boaters can get a free domestic-only MMSI from registrars such as BoatUS. Vessels traveling internationally need an FCC-issued MMSI, which comes with a ship station license.

Is a GMDSS VHF radio required on commercial vessels?

SOLAS ships must carry GMDSS VHF equipment, including fixed DSC radios and portable survival-craft radios. US commercial vessels covered by the Bridge-to-Bridge Act must carry a VHF radiotelephone and monitor Channel 13.

How far can a VHF marine radio reach?

VHF is line-of-sight, so range depends mainly on antenna height. A fixed-mount radio with a masthead antenna reaches much farther than a handheld held at deck level.

What channel should I monitor on a VHF radio?

Channel 16 is the international distress and calling channel and should be monitored whenever the radio is on. Vessels subject to the Bridge-to-Bridge Act also monitor Channel 13 in US waters.