Cutting Ties: For offshore yachtsmen, a harness is a lifeline. It’s the difference between slipping on deck or becoming a man overboard. It’s not uncommon, however, to hear about harnesses behaving badly and trapping sailors in compromising positions, which is where Gill’s Harness Rescue Tool ($17) comes in handy. Made from titanium, it’s an extremely sharp cutter that can dispense with harness webbing, cords and small lines. This pocket-size tool is easily tethered to a life jacket or harness. Its shackle keys and flat-head screwdriver help to tackle small maintenance tasks too. A built-in bottle opener addresses a different onboard emergency.