Why Every Boat Needs a VHF Marine Radio
A VHF (Very High Frequency) marine radio is the single most important piece of safety communication equipment on your boat. It's how you call for help in an emergency, monitor weather forecasts, hail marinas and bridges, and communicate with other vessels. Channel 16 — the international distress and calling channel — is monitored 24/7 by the U.S. Coast Guard and nearby vessels.
Unlike a cell phone, a VHF radio works when you're out of cell range, doesn't rely on a carrier network, and can broadcast a distress call to every vessel and the Coast Guard simultaneously with a single button press. It's not optional — it's essential.
Fixed-Mount vs. Handheld VHF: Which Do You Need?
Fixed-Mount VHF Radios
Permanently installed at the helm, fixed-mount VHF radios offer:
- 25 watts of transmit power — range of 15–25+ miles depending on antenna height
- Larger, easier-to-read displays
- External antenna connection — a quality antenna dramatically extends range
- DSC (Digital Selective Calling) with GPS integration for automatic position transmission in a distress call
- Best for: any boat with a permanent helm, day boats, offshore vessels
Handheld VHF Radios
Battery-powered and portable, VHF handheld radios offer:
- 5–6 watts of transmit power — range of 3–7 miles
- Waterproof and floatable designs for use in the water
- No installation required — ready to use out of the box
- Best for: kayaks, canoes, dinghies, as a backup to a fixed-mount, or for crew members away from the helm
Recommendation: If your boat has a helm, install a fixed-mount radio as your primary and keep a handheld as backup. The power difference is significant in an emergency.
Key Features to Look For
DSC (Digital Selective Calling)
DSC is the most important safety feature on a modern VHF radio. With one press of the dedicated distress button, DSC sends an automated Mayday signal that includes your vessel's MMSI number and — if connected to GPS — your exact position. Every USCG station and DSC-equipped vessel within range receives it instantly.
To activate DSC, you must register your radio's MMSI number. Registration is free through BoatUS, Sea Tow, or the FCC. Do this before your first trip.
GPS Integration
Fixed-mount radios can connect to your chartplotter or a built-in GPS to automatically include your coordinates in DSC distress calls. Some models — like the Garmin VHF 215 and Uniden UM725G — include a built-in GPS so you don't need an external connection.
AIS Receiver or Transponder
Some advanced VHF radios include a built-in AIS receiver or Class B transponder. This lets you see nearby commercial and recreational vessel traffic on your chartplotter — a major collision-avoidance advantage in busy shipping lanes. The Garmin VHF 215 AIS is an excellent example of this capability in a mid-range radio.
NOAA Weather Channels
All marine VHF radios include NOAA weather channels. Look for models with weather alert functionality that automatically sounds an alarm when NOAA broadcasts a severe weather warning for your area.
Waterproofing
For fixed-mount radios, look for IPX7 or IPX8 ratings (submersion protection). For handhelds, IPX7 minimum — and floatable designs are a bonus if the radio goes overboard.
Hailer / Foghorn
Many fixed-mount radios include a built-in hailer that connects to an external speaker, allowing you to broadcast your voice or an automatic foghorn signal. Useful for hailing dock hands, bridges, and other vessels at close range.
Our VHF Radio Picks at Egret Marine
Best Entry-Level Fixed-Mount: Garmin VHF 115
The Garmin VHF 115 is a clean, straightforward 25-watt fixed-mount radio with DSC, NOAA weather alerts, and a bright display. A reliable, no-frills choice for boaters who want solid performance at an accessible price point.
Best Mid-Range Fixed-Mount: Garmin VHF 215 & VHF 215 AIS
The Garmin VHF 215 adds built-in GPS to the mix, so your DSC distress calls automatically include your position even without a chartplotter connection. Step up to the VHF 215 AIS for a built-in AIS receiver that displays vessel traffic on compatible Garmin chartplotters — a significant safety upgrade for coastal and offshore boating.
Best Value Fixed-Mount: Uniden UM725 Series
The Uniden UM725 delivers 25 watts, DSC, and NOAA weather alerts in a compact, affordable package. Available in black or white, with or without built-in GPS. A great choice for budget-conscious boaters who don't want to compromise on core features.
Best Handheld with GPS & Bluetooth: Uniden MHS338BT
The Uniden MHS338BT is a feature-packed handheld with built-in GPS, DSC, and Bluetooth connectivity. Bluetooth lets you pair it with a smartphone for wireless operation and position sharing. Waterproof and compact — an excellent primary radio for kayaks and small boats, or a capable backup for larger vessels.
Best Floating Handheld: Uniden Atlantis 275
The Uniden Atlantis 275 floats face-up if dropped overboard — a critical feature for kayakers and anglers. Submersible, compact, and easy to use. A reliable backup radio or primary for paddle craft.
Shop the Uniden Atlantis 275 →
VHF Radio Setup Checklist
- ✅ Fixed-mount radio installed at the helm (25W)
- ✅ Quality VHF antenna mounted as high as possible
- ✅ MMSI number registered (free via BoatUS or Sea Tow)
- ✅ GPS connected or built-in for DSC position reporting
- ✅ Channel 16 set as default/watch channel
- ✅ Handheld VHF aboard as backup
- ✅ Crew briefed on how to send a DSC distress call
VHF Antenna Tips
Your radio is only as good as your antenna. A few guidelines:
- Mount as high as possible — VHF is line-of-sight. Higher antenna = longer range.
- 3 dB gain antenna (omnidirectional) is standard for most recreational boats.
- 6 dB gain extends range but narrows the vertical beam — better for powerboats than sailboats that heel.
- Use low-loss coaxial cable (RG-8X or RG-213) for runs over 20 feet.
- Inspect connectors annually for corrosion.
Shop VHF Radios at Egret Marine
Browse our full selection of fixed-mount and handheld VHF radios from Garmin, Uniden, and more in our Electronics & Navigation collection.
Not sure which radio is right for your boat? Contact our team — we're happy to help you choose.