Marine VHF Radio Buying Guide: Fixed-Mount vs. Handheld, DSC and Range
Quick answer: Every boat that leaves sight of the dock should have a fixed-mount VHF (25 watts, wired to a tall antenna) as its main radio, plus a floating handheld VHF as backup and for the dinghy or a dead battery. Choose a fixed radio with DSC and built-in GPS so one button sends your exact position in an emergency, and register an MMSI number to make that button work.
A cell phone is not a marine radio. Coverage drops off quickly offshore, a phone call reaches one person, and a VHF call on channel 16 reaches every boat, marina, towing service and Coast Guard station in range. A VHF radio is the most important piece of safety electronics on most boats, and a good one costs less than a tank of fuel. This guide covers fixed versus handheld, range, DSC and the features worth paying for.
Step 1: Fixed-mount vs. handheld
| Fixed-mount | Handheld | |
|---|---|---|
| Max transmit power | 25 watts | Typically 5 or 6 watts |
| Antenna | External, mounted high | Short built-in antenna at hand height |
| Typical range boat to boat | Often 10 to 20+ miles with a good antenna | Often 2 to 5 miles |
| Power source | Boat battery | Rechargeable battery |
| Best for | Primary radio on any boat | Backup, dinghy, kayak, small skiffs |
The short answer is to have both. A fixed radio gives you range. A handheld keeps working if the boat loses power or you have to abandon ship.
Step 2: Understand range
VHF is line of sight. Range depends far more on antenna height than on watts. Two boats with antennas around 8 to 10 feet off the water typically talk at roughly 10 to 15 miles, while a Coast Guard tower antenna hundreds of feet up can hear you much farther. A handheld held at chest height is limited by its low antenna, which is why its range is so much shorter. To get the most from a fixed radio, pair it with a quality antenna mounted as high as practical. See our VHF antenna guide.
Step 3: DSC, GPS and MMSI
Digital Selective Calling (DSC) adds a red distress button. Press and hold it, and the radio sends a digital distress alert with your boat's identity and GPS position to the Coast Guard and nearby DSC radios.
- Built-in GPS means the radio always knows your position. Without it, you must connect the radio to a GPS or chartplotter.
- MMSI number: a nine-digit ID you program into the radio. Without it, the distress button cannot identify you. Recreational boaters in U.S. waters can get one free through organizations like BoatUS; boats traveling to foreign ports need one issued through an FCC ship station license.
- DSC direct calling also lets you call a buddy boat privately by its MMSI, like a phone call.
Step 4: Features worth paying for
- Built-in AIS receiver: shows nearby ships on the radio screen or your chartplotter. Great for night running and shipping lanes.
- NMEA 2000 or 0183: shares position and AIS data with your chartplotter.
- Hailer/loudhailer output: lets you add a loudspeaker for talking to the dock or other boats.
- Second station mic: a second handset at the flybridge or tower.
- Waterproof rating (IPX7 or better) and a floating design for handhelds.
- Bluetooth: some models pair with a phone app for programming and contacts.
Step 5: Install and use it right
- Mount the radio where the helmsman can reach it and hear it over the engine.
- Run the antenna cable as short as possible with good marine coax, and seal every connection.
- Wire power through a properly sized fuse or breaker.
- Program your MMSI and connect GPS if the radio does not have it built in.
- Monitor channel 16 when underway, and do a radio check on a working channel, not 16.
Our picks by boat and budget
All in stock at Boat Supplies Direct.
Best value fixed radio with GPS
Standard Horizon GX1410G Eclipse with GPS or the Uniden UM725 with GPS. DSC, built-in GPS and 25 watts at an entry price.
Networked radio for boats with a chartplotter
Standard Horizon GX1850 with NMEA 2000 or the Garmin VHF 215, which pairs cleanly with Garmin electronics.
Radio with built-in AIS
Standard Horizon GX2410GPS with AIS receiver, GPS, NMEA 2000 and hailer, or the commercial grade Standard Horizon Quantum GX6000.
Handheld backup
Standard Horizon HX210 Floating Handheld for a simple, affordable backup, or the Standard Horizon HX891BT with GPS, DSC and Bluetooth.
Shop all fixed-mount VHF radios →
Shop all handheld VHF radios →
Frequently Asked Questions
Do I need a VHF radio on my boat?
Recreational boats under 65 feet in U.S. waters are generally not required to carry one, but a VHF is the most reliable way to call for help on the water and is strongly recommended for any boat that goes offshore or beyond cell coverage.
How far can a marine VHF radio transmit?
VHF is line of sight. A fixed radio with a well-mounted antenna typically reaches 10 to 20 miles boat to boat, farther to tall shore stations. Handhelds are usually limited to a few miles.
Is a handheld VHF enough?
For kayaks, dinghies and small boats near shore it can be, but its low power and short antenna limit range. For most boats, a handheld is the backup and a fixed radio is the primary.
What is DSC on a marine radio?
Digital Selective Calling sends a digital distress alert with your MMSI and GPS position at the press of a button, and allows private calls to other DSC radios.
How do I get an MMSI number?
Boaters staying in U.S. waters can register for a free MMSI through organizations such as BoatUS. If you travel to foreign ports, you need one through an FCC ship station license.
Do I need a license for a marine VHF?
Recreational boats operating only in U.S. waters generally do not need a station license for VHF. Boats traveling to foreign ports or required to carry a radio need an FCC license.
This guide is general information. Check current FCC and U.S. Coast Guard rules for your boat and where you travel, and follow your radio manufacturer's installation manual.
