Collins had just retired from the Navy, and friends say he was an experienced diver.
Collins was one of four people pulled from the water after a boat capsized off Alki Beach. Medical examiners say salt water drowning was the cause of death.
Seattle Fire officials said four people were pulled from frigid Puget Sound waters Friday afternoon after a boat capsized off Seattle, but one of the men rescued died later in the day.
Coast Guard Petty Officer George Degener said the 30-foot aluminum boat capsized just south of Alki Point around 2 p.m. Friday while the commercial vessel was conducting a dive survey.
Three people on board were immediately pulled from the waters and rushed by boat to Harbroview Medical Center for treatment of possible hypothermia.
Divers searched the nearby waters for a fourth person, identified as Anthony Collins, who had been on board but was missing. He was found about an hour later under the boat, officials said.
A Coast Guard helicopter from Port Angeles arrived on scene and hoisted Collins on board for a direct airlift to Harborview Medical Center where he was listed in critical condition.
Winds were gusting out of the south at 29 mph at the nearby Alki Point Lighthouse at 2 p.m., but it's still unclear what caused the boat to capsize.
Degener did not have any details on the medical condition of the other three people pulled from the water.