Mercury - 1st Mate Wearable Accessories Safety & Security Kit Marine-Ready Components 8M6007945. Overview. There's a certain comfort that comes from knowing the people on your boat are protected-not just by your experience at the helm, but by technology designed to watch over everyone onboard. The 1st Mate system brings that comfort into everyday boating, offering a quiet sort of reassurance that settles in once you leave the dock. With the Quicksilver 8M6007945 wearable accessories, that safety