Navionics Anchor Alarm: Does It Exist? What to Use Instead (2026)
You've anchored for the night, opened Navionics to check the chart, and gone looking for the anchor alarm. It isn't there. You're not missing a menu — here's what's actually going on, and the setup most cruisers use instead.
Quick answer
The Navionics Boating app does not have a built-in anchor alarm as of 2026. The “Anchor Drag” alarm you may have read about belongs to Garmin chartplotters, not the phone app. Most sailors keep Navionics for charts and run a dedicated anchor alarm app alongside it.
Why Everyone Expects Navionics to Have an Anchor Alarm
Navionics is the most widely used charting app afloat, and it keeps growing features: routing, tides, sonar charts, tracking, and more recently an AIS collision alarm. So when sailors settle in for a night at anchor, the natural assumption is that anchor watch is in there somewhere too.
It isn't — and it has been a long-running complaint in sailing forums. The confusion is made worse by the fact that Navionics is owned by Garmin, and Garmin's chartplotters genuinely do have an Anchor Drag alarm. Online instructions for the two products get mixed together constantly, which is why you'll find “Settings > Alarms > Anchor Drag” guides that simply don't match anything in the phone app.
The Garmin Chartplotter Anchor Drag Alarm (the Feature People Confuse It With)
On most Garmin chartplotters you can enable an anchor alarm under Settings > Alarms > Navigation > Anchor Drag: switch the alarm on, set a radius, and the plotter alerts you if the boat moves outside it. If you have a Garmin plotter at the helm, it's worth turning on every time you anchor.
But as your only anchor watch, a chartplotter alarm has three practical problems:
- It sounds at the helm, not in your bunk. Through a closed companionway, over wind and halyards, a plotter beeper may not wake you.
- It keeps the electronics on all night. Plotter plus instruments can pull a meaningful chunk of your service battery by morning.
- It stays on the boat. Dinghy ashore for dinner and the alarm can't reach you.
That's why even boats with a full electronics suite usually run a phone-based alarm as the primary and keep the plotter alarm as backup. We've compared the two approaches in detail — Garmin, Raymarine and B&G included — in chartplotter anchor alarm vs anchor alarm app.
The Navionics Track “Workaround” — and Why It Isn't an Anchor Watch
A workaround you'll see suggested is to start a track in Navionics when you anchor. Your swing circle slowly draws itself on the chart, and a glance at the phone tells you whether the pattern looks right.
As a visual sanity check, it's genuinely useful. As an anchor watch, it fails the only test that matters: nothing wakes you up. There is no safe radius, no alert, no sound — and phone power-saving modes can quietly pause background tracking, so the track may simply stop while you sleep. An anchor alarm has one job: to make noise, loudly and automatically, the moment your boat leaves its circle. A passive track can't do that job.
The Setup Most Cruisers Actually Use
There's no need to give up Navionics — it's excellent at what it does. The standard setup is a division of labour:
- Navionics for charts and planning — finding the anchorage, checking depths and seabed, plotting tomorrow's route.
- A dedicated anchor alarm app for the night — background GPS monitoring, a proper safe radius, and a loud, persistent alarm on the phone that sleeps next to you.
- The chartplotter alarm as backup — if you have one, switch it on too. Redundancy costs nothing.
Navionics vs. Chartplotter vs. Dedicated Anchor Alarm App
| Feature | Navionics Boating app | Garmin chartplotter | Anchor alarm app |
|---|---|---|---|
| Built-in anchor alarm | No | Yes (Anchor Drag alarm) | Yes — core feature |
| Wakes you in the cabin | — | Depends — alarm sounds at the helm | Yes — phone alarm next to your bunk |
| Runs with screen locked | Tracking only, no alert | Plotter must stay powered on | Yes — background GPS monitoring |
| Overnight power cost | Phone battery | Plotter + instruments on all night | Phone battery (plug into USB) |
| Works offline | Yes (downloaded charts) | Yes | Yes — GPS needs no internet |
| Alarm follows you ashore | — | No | Yes — take the phone in the dinghy |
Setting Up the Anchor Alarm Side Properly
Whichever app you pair with Navionics, the setup habits are the same:
- Set the radius from your scope, not a guess. A boat on 5:1 scope in 5 m of water needs roughly a 40 m alarm radius to allow for normal swinging. Our anchor scope calculator does the arithmetic for you, and every anchorage guide on this site lists a recommended alarm radius per spot.
- Mark the anchor position, not the boat position. Set the anchor point where you dropped, then let the boat settle back on the rode.
- Allow for GPS scatter. Phone GPS wanders a few metres even at rest — too tight a radius means 3 a.m. false alarms. See our guide to GPS accuracy for anchor monitoring.
- Plug the phone in and test the sound. Background GPS runs all night; a USB socket and a volume check take ten seconds.
The Bottom Line
Searching for the Navionics anchor alarm isn't a failure of your menu-hunting — the feature has never been in the Boating app. Keep Navionics as your chart table, put a Garmin plotter's Anchor Drag alarm on backup duty if you have one, and give the actual night watch to a dedicated anchor alarm app on the phone beside your bunk. For a full comparison of the options, see our anchor alarm app comparison.
Frequently Asked Questions
Does the Navionics Boating app have an anchor alarm?
Where does the 'Anchor Drag' alarm setting come from, then?
Can I use Navionics tracking as an anchor watch?
What should I use alongside Navionics for anchor monitoring?
Is a chartplotter anchor alarm enough on its own?
The Anchor Alarm Navionics Doesn't Have
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