(Astoria, OR)  --  The captain of a small sailboat is lucky to be alive after being forced to abandon ship in rough coastal waters near Astoria.  The U.S. Coast Guard says the man was sailing near Fort Stevens State Park yesterday when his 26-foot boat became disabled.  Coast Guard video shows the boat being thrashed by surging whitecaps before the man jumps overboard and starts swimming toward shore.  A Coast Guard boat crew rescued the man and brought him to shore, where he was evaluated for injuries.  Authorities say the boat later washed up on the beach at Fort Stevens State Park.