Thanks all I've completed development of a Man Overboard sensor that alarms on the boat (and can be fitted to release tracking and safety gear automatically) if crew or passengers exit the boat while underway. It was developed on spec for the Navy after a rash of ofshore personnel losses durig Gulf War. I'm ready to market during sspring 07 boat show season. Has anyone had any experience (good or bad) with Man Overboard devices or equipment designed to protect children on boats or around marinas?