Here are a couple of water activated MOB related devices:
MOB+ by Fell Marine www.fellmarine.com
The FOB the skipper wears communicates to an Engine kill switch via bluetooth when activated by water. The FOB worn by passengers sounds an alarmTest shows boat comes to a stop in 6 seconds.
Support page has install instructions for all major O/B's
Max of 4 FOB's
CrewWatcher by www.crewwatcher.com
When water activated, the FOB (up to 5 FOB's) activates an alarm on a phone/tablet app. App then directs you to the FOB. No engine kill function.
MOB+ by Fell Marine www.fellmarine.com
The FOB the skipper wears communicates to an Engine kill switch via bluetooth when activated by water. The FOB worn by passengers sounds an alarmTest shows boat comes to a stop in 6 seconds.
Support page has install instructions for all major O/B's
Max of 4 FOB's
CrewWatcher by www.crewwatcher.com
When water activated, the FOB (up to 5 FOB's) activates an alarm on a phone/tablet app. App then directs you to the FOB. No engine kill function.