The 1st Mate system is the industry's first engine-integrated intelligent hub and wearable device that integrates with marine propulsion systems to provide safety alerts and information. The main features of 1st Mate include: (1) Man overboard monitoring for captain and up to 7 passengers; (2) distress message capability; and (3) theft deterrent functionality. This kit works with Mercury SmartCraft Engines (dual engines only) and includes the vessel hub, harness & captain fob, an adjustable wristband and carabiner clip. The passenger fobs and wearables are sold separately.The new standard in marine safety and security, 1st Mate adds another layer of boating safety by notifying a boat's captain or its passengers if someone has fallen overboard. 1st Mate also serves as an effective deterrent to boat-and-engine theft.