Tragedies are a part of our sport, one that we all sadly accept. But fewer tragedies are more traumatic than those that could have been prevented, cheaply. The Gill Harness Rescue Tool ($16) is quite literally a sailor’s lifesaver. This is the one item of equipment you buy, you carry, and you forget about it, until you find yourself pinned underwater, tangled a web of sheets and canvas. And, when absolutely necessary, the blade will turn your harness webbing to butter. If that’s not reason enough, it doubles as shackle key, a screw driver, and for the most dreaded situation, it is an emergency bottle opener.