USCG Cutter Assateague - File Photo GUAM – Three crewmembers aboard a 42-foot U.S.-flagged fishing boat are safe after Coast Guard Sector Guam received a distress signal from the vessel, prompting a search and rescue Tuesday.   Coast Guard watchstanders were notified by Saipan Emergency Management Office on Wednesday of a mayday call received at about 8 a.m. Shortly after being notified, an...