Suddenly went nuts!
Firstly, I have to say its a great app, started out fine, and matched my Garmin GPSs distance to anchor within 3 ft.
However... At about 3am, the wind shifted about 90o, and suddenly the alarm went off (nice and LOUD too!) It said the anchor had gone from 60ft to over 120ft distance, which it hadnt, thank god.
Seems just a small bug somewhere in the calculation, when the wind was in the same direction, it was perfect.
Bay_Sailing about
DragQueen Anchor Alarm