Chances are, it's not going to happen to you. But when you're dealing with something as stressful as a complete loss of electronics at sea, do you really want to take silly risks? Redundancies in shipboard equipment are necessary on offshore voyages-and that's not because failures are likely or common-it's because when they do happen, you're usually a good couple hundred, or thousand, miles from a tow. On my boat, I have two fixed GPS units, two compasses, and two VHFs. I know it's only Neptune's sick sense of humor that none of my redundant equipment has ever been put to use. Unfortunately, my depthsounder, my autopilot, and my radar have each gone on the fritz at some point. I'm a coastal cruiser, though. If I were making a trans-Atlantic passage, I'd have two of everything.