LA JOLLA, Calif. -- The man who died after he ran out of air on his first certified dive, despite a desperate attempt by his son to save him, was identified Monday as a 45-year-old Poway resident.

John Sonsteng is also survived by his wife.

The father and son were diving at a depth of 155 feet around 9 a.m. Saturday off La Jolla Shores when he ran out of air, said San Diego lifeguard Lt. John Greenhalgh.

His 19-year-old son attempted to surface with his father while sharing his tank, but the younger diver ran out of air at a depth of 40 feet, forcing him to ascend immediately, Greenhalgh said.

The elder Sonsteng's body was found by a remote-control underwater vehicle after a five-hour search by divers, a helicopter and boaters.

Sonsteng's son was hospitalized as a precaution because of his rapid ascent, Greenhalgh said.