PETALUMA (AP) — A fisherman is OK after his boat became stranded in a marsh when the tide started going out and he became stuck in mud when he tried to walk ashore, a U.S. Coast Guard official said Sunday. A Coast Guard helicopter crew was called to an area near the mouth of the Petaluma River around 6 p.m. Saturday when the man became stuck and he used a hand-held radio to call for help, said Coast Guard Ensign Corrine Gaines. "He figured he could hike out of there, but he didn't realize how far he had to go, "Gaines said.