Mercury - Wearable Fob Kit 1st Mate Passenger System Marine Safety Gear 8M6007948. Overview. Boating is supposed to feel freeing-wind on your face, the hum of the engine, the quiet trust that everyone on board is safe. That sense of calm is exactly what the 1st Mate passenger fob kit helps preserve. Whether you're heading out with kids, friends, or anyone who isn't at the helm, having the right safety gear makes every trip feel more secure. And when that gear integrates smoothly into your boatin