Anchor Alarm by SailGrib, is a modern full featured anchor alarm app.

- Start the app before your anchor, the app will record and draw your track on a map.
- Leave your phone on the chart table.
- Moore without worrying about the application.
- Return to the application.On the track, locate the point corresponding to the boat's position at the time of anchoring. You should be able to detect it relatively easily on the map thanks to the reverse movement after anchoring.
- Center the map on the anchor point using the target sign in the middle of the screen.
- Press the blue "Anchor" button to fix the anchor position.
- Adjust the radius of the wetting area by moving the green dot to the edge of the zone.
- Fix the wetting area by pressing the "Anchor" button again, it turns green. The alarm is activated.

NEW: Use your Navionics boating charts within the app!

With the Premium option:
- Define a hexagonal and editable wetting zone on the screen.
- Send a mail when an alarm is raised.
- View SailGrib WR maps.
- Import the GPX trace of SailGrib WR if you forgot to start the application before wetting.

The app runs in the background and uses the latest Android techniques to reduce power consumption while maximizing position accuracy.

Note that the accuracy of your position depends on your phone and your location. As of march 2021, we consider that most phones have an accuracy between 2 and 10 meters while at sea.