Strong winds, high waves and toxic gases are hindering dozens of rescue boats struggling to locate missing sailors from a stricken oil tanker in the East China Sea and to extinguish a fire that has burned for the past three days on the ship. The poor conditions, with rain and waves as high as (10 fee), frustrated efforts to tame the fire and search for the 31 remaining tanker crew members, China’s Ministry of Transport said in a statement on Tuesday.