(Honolulu) — The U.S. Coast Guard in Hawaii was searching Wednesday for a Chinese mariner attempting to set a solo sailing record from San Francisco to Shanghai. The Maritime Rescue Coordination Center China contacted the Coast Guard in Honolulu after not hearing from Guo Chuan in 24 hours. The Coast Guard located his 97-foot trimaran on Tuesday about 600 miles northwest of Oahu, but rescuers searching from the air saw no sign of him onboard.