NGA: Anchor Alarm

NGA means Not Going Anywhere. It is a practical anchor alarm for sailors. Drop the anchor, mark the spot, set a swing radius. NGA monitors your boat's GPS position, including from the background, and raises a loud alarm if the boat drifts outside the safe circle, even when your phone is on silent. HOW IT WORKS - Set the anchor point from your current position - Tune the swing radius by hand, or size it from depth, rode, and bow height with the scope calculator - For a tight anchorage, limit the swing to an arc instead of a full circle - NGA watches position continuously, on deck or asleep below - If the boat leaves the safe zone, a loud alarm sounds and keeps sounding, even on silent, until you acknowledge it BUILT FOR REAL CONDITIONS - The alarm plays through the audio channel, so it is heard with the ringer off or the screen locked - GPS accuracy is shown plainly. Unreliable readings…