Two Britons ended a record-setting row across the Pacific Ocean Friday, passing underneath San Francisco's Golden Gate bridge more than six months after leaving Japan in a 23-foot (seven-meter) boat. The two said they were the first to row the roughly 4,600-mile passage across the North Pacific ocean, on a course that extended to nearly 7,000 miles thanks to unintended detours courtesy of ocean currents. Mick Dawson and Chris Martin said they had hoped to make the trek completely unassisted, although they ran out of food about 100 miles from California and accepted a helicopter drop of aid. Over the months, the pair took two-hour shifts of rowing and sleeping in a tiny cabin at one end of their kayak-shaped boat, named Bojangles. The two could row together or singly.