CrewWatcher is an app-based crew overboard alarm system. It is the fastest way to rescue a person who is overboard. The system is made up of two components: a smartphone application and a small beacon that can be comfortably worn by each crew. The beacon does not require complex manual activation. The alarm will trigger automatically in a Man Overboard (MOB) event. Should someone go overboard, after sounding the alarm, the app will automatically provide lat/long coordinates of the MOB event, the time of the event, and will visually guide the rescuer using the virtual MOB compass. Features Include: FREE App operates on most smart phones or tablets & is easy to use No cell service required Automatically updates with new features (both App & beacon) One smart device watches up to 5 crew members Perfect also for children, pets, a towed dinghy or bilge alarm Activates with water immersion OR separation from vessel Rescue: Shows crew overboard bearing, plus distance & lat/long coordinates at point of loss Bearing adjusts as boat moves and “MOB Compass” points to location 30x faster response than Personal AIS Beacon at 1/3 the price WINNER, 2017 Sail Magazine Innovation Award WINNER, 2017 DAME Design Award Can also be attached to dog collars! System Requirements: Operating system Android 5.1 and up.iOS 6.1 and up. We recommended for use with iPhone 5 and later, Samsung Galaxy S6 and later, Sony Z2 and later. Bluetooth A device that supports Bluetooth 4.0 and up. GPS GPS (Not assisted GPS like in WiFi iPads) Storage At least 50 mb of free space. Vessel Works best on non steel boats up to 45 foot. Links below: Quick Start Guide Battery Information Sheet Warranty & Liability Disclaimer