Reader-supported. GopherTrunk is free, open-source software. Some
hardware links on this page go to Amazon with our Associates tag
(gophertrunk-20); if you buy through them we may earn a small
commission at no extra cost to you. It never changes which gear we recommend, and
the software stays free either way. How GopherTrunk is funded →
Best Marine Scanner (VHF Boating, 2026)
A marine scanner is a fantastic listening tool and a dangerous thing to mistake for a marine radio. It lets you monitor harbor, bridge, and vessel traffic and NOAA weather cheaply — but it cannot transmit, so it is never a substitute for the licensed VHF radio that actually keeps you safe on the water. Here’s the honest setup for boaters.
Key takeaways Best marine scanner: Uniden BC125AT (~$110) — covers marine VHF 156–162 MHz and NOAA weather. Channels to monitor: 16 (distress/hailing), 09, plus local port/bridge channels. Marine voice is analog — an analog scanner hears it. A scanner receives only — you still need a real marine VHF radio for DSC and distress calls.
Safety first: a scanner is not a marine radio
Say it plainly: a scanner is receive-only. It cannot key up channel 16 to call for help, and it can’t send a DSC distress alert with your position. Every boater still needs a proper marine VHF radio — a fixed-mount or handheld unit, properly licensed, ideally DSC-equipped and tied to your MMSI. A marine scanner is a listening supplement for monitoring extra traffic; treat it as an add-on, never a replacement for the radio that calls the Coast Guard.
The marine VHF band
Marine voice lives in 156–162 MHz and is analog FM, so a cheap analog scanner receives it clearly. The channels a boater cares about:
- Channel 16 — 156.800 MHz. International distress, safety, and calling. Always monitored.
- Channel 09 — 156.450 MHz. Common secondary hailing / recreational calling.
- Working, bridge, lock, and port-operations channels vary by waterway.
- NOAA marine weather — 162.400–162.550 MHz, just above the marine band. See the frequency guide.
- Channel 70 — DSC. A digital signaling channel for distress/calling data, not routine voice — and something only a real DSC radio uses.
The pick
Uniden BC125AT
around $110
Covers the full marine VHF band and NOAA weather, banks channels 16 and 09 with your local working channels, and Close Call grabs nearby vessel traffic. Receive-only — pair it with a real marine radio.
Check price on Amazon →What a marine scanner does — and doesn’t
| Capability | Marine scanner (BC125AT) | Marine VHF radio |
|---|---|---|
| Monitor channel 16 / 09 traffic | Yes | Yes |
| NOAA marine weather | Yes | Yes |
| Transmit a distress call | No | Yes |
| Send DSC alert + position | No | Yes |
| Scan many channels quickly | Yes | Limited |
| Approx. price | ~$110 | varies |
Never rely on a scanner for safety. It cannot call for help. Carry a licensed marine VHF radio; use the scanner to listen in on the wider harbor and weather picture alongside it.
Why analog, and why not digital
Marine VHF voice is analog, so there is no reason to buy a digital P25 scanner for boating — the BC125AT hears everything on the water. The only digital element, DSC on channel 70, is signaling data your real marine radio handles, not something you monitor as voice.
Logging harbor traffic with GopherTrunk
Boaters with a laptop aboard can add a $30 SDR and free GopherTrunk to record and timestamp harbor, bridge, and weather traffic across many channels at once — useful for a marina office or a research vessel. It’s still receive-only and needs a running PC, so it changes nothing about the safety rule: you carry a proper marine VHF radio regardless. See scanner vs SDR.
Bottom line
The Uniden BC125AT is the best marine scanner for most boaters — around $110, it monitors marine VHF 156–162 MHz including channels 16 and 09, plus NOAA weather, all in analog. But be clear-eyed: a scanner only receives. It is a listening supplement, and every boat still needs a licensed, DSC-equipped marine VHF radio for the calls that actually matter. For the broader scanner lineup, see the best police scanners guide.
Frequently asked questions
What is the best marine scanner?
A ~$110 Uniden BC125AT covers the marine VHF band (156–162 MHz) including channel 16 (distress/hailing) and channel 09, plus NOAA marine weather. It’s an inexpensive way to monitor harbor, bridge, and vessel traffic — but it only receives, so it is not a substitute for a licensed marine VHF radio.
Can a scanner transmit on marine VHF?
No. A scanner is receive-only. For safety you must carry a proper marine VHF radio (fixed or handheld) that can transmit a distress call on channel 16 and use DSC. A scanner is a listening supplement, never a replacement.
What marine VHF channels should I monitor?
Channel 16 (156.800 MHz) is the international distress, safety, and calling channel; channel 09 is a common hailing/recreational channel; and the working, bridge, lock, and port-operations channels vary by area. NOAA weather sits just above at 162.400–162.550 MHz.
Do marine radios use DSC?
Yes. Digital Selective Calling (DSC) sends a digital distress alert with your position and MMSI over channel 70. A receive-only scanner doesn’t send DSC — only a proper DSC-equipped marine VHF radio does, which is another reason a scanner can’t replace one.
Is marine VHF analog or digital voice?
Marine VHF voice is analog FM, so an inexpensive analog scanner receives it clearly. DSC is a separate digital signaling channel (70) for distress and calling data, not routine voice traffic.