I'm I allowed to post this ? If not please delete.
I wrote a small App for android devices. It is in beta phase. So anyone willing to test it is welcome.
Personal Anchor Alarm (PAA) is maritime anchor watch. It is different from any other known Anchor Alarm. Safe area is not a circle and no radius around the anchor point is requested; you just draw a virtual polygon around your boat. Using advanced algorithms PAA is designed to use as little battery as possible and still provides supreme accuracy and safety. It runs as background service, so no phone call or incoming SMS will put it on sleep. PAA is a valued member of Your crew, providing additional safety while laying on anchor at night.
PAA usage process also distinguishes it from other similar apps. Unlike other apps PAA does not require any app interaction during anchoring. You can fully concentrate on anchoring process and you start PAA only when anchoring is completed. Anchor position is completely irrelevant. You just start PAA, put phone or tablet on desk and wait few minutes for PAA to plot floating area of your boat. Then you choose the safe area (depending on map reference and visual perimeter scanning), plot polygon points (vertices/corners), check distance and bearing to each point and activate watch mode. Done!
Alarm is sounded when your boat leaves the safe area, when battery drops below preset level or when GPS signal is lost for predefined time interval.