Justin's right
A barberhaul is another line used to adjust the jib clew--usually to bring the clew further inboard to narrow the slot between the main and jib to increase speed. This can also be done by pulling on the windward jib sheet. It's another one of the dozens of ways to squeeze an extra quarter-knot out of your boat. IMHO, barberhauling is of little value unless you have perfect sail trim and never wander off course. Then again, I feel the same way about backstay adjusters, boom vangs, Cunninghams and travelers. The fewer lines, blocks and holes on my deck, the better. Had a great weekend outing on Lake Pepin, a natural lake on the Upper Mississippi River. Sailed hard in steady 15 mph winds and even towed the kids in the inflatable for an hour. Beached our 26S on a sandbar for a swim call and anchored out for another. Love this boat. Happy sailing!