The spacecraft engineer for Boeing Satellite Systems and three dive buddies entered the water at about 8:45 a.m. Sunday, but Carlock had problems equalizing the pressure in his ears and he fell behind. He tried following his partners' bubbles, but he lost them.
He decided to end the dive after 15 minutes, but he was 400 feet down current from an oil platform where the boat was anchored. He blew his whistle to attract attention.
"I figured when the dive was over they would realize I was missing and come looking for me," Carlock said.
But they never came. The boat left and headed for a shipwreck six miles southeast of the entrance to the Port of Los Angeles, said Coast Guard Petty Officer Collin Croft.