Two main parts comprise the ATN Topclimber, above. Note the simple foot loops and the hard plastic seat, which PS testers found to be less than comfortable.

Earlier this year, celebrated singlehanded sailor Ellen MacArthur was feted at the dock in Falmouth, UK, upon returning from a record-setting, 71-day-and-change, non-stop, solo circumnavigation. Her accomplishment is a marvel. She overcame myriad obstacles to maintain a competitive pace aboard her 75-foot purpose-built trimaran B&Q. Perhaps one of the greatest challenges of her sojourn was ascending the 100-foot mast several times to repair the mainsail track and other items.

With any luck, most sailors won't need to resort to such heroic measures to keep their vessels going at sea, but from time to time, a trip up the spar is necessary. And when that time comes, whether the boat is at…