Two dead, one missing in US navy helicopter crash

According to the Naval Air Systems Command website, the three-engine helicopter searches for sea mines and does onboard delivery missions. The 99-foot craft holds a crew of up to eight, including two pilots and is capable of speeds of more than 170 mph.

It was not immediately known why the chopper, that weighs up to 34 tons, went down about 20 miles from Virginia Beach, and the Navy said the crash is under investigation.

The Navy said Virginia Beach Fire Department boats located the aircraft fuselage and tail section. Coast Guard and Navy ships also responded, including the guided missile destroyer USS Jason Dunham. Navy aircraft also were involved in the search.

The Navy said the identity of the dead crewmen would be released 24 hours after his family was notified. Those aboard the chopper were wearing survival suits designed to keep water away from the body.

However, an adult could survive probably one to three hours in 40- to 50-degree water and would become exhausted or unconscious between 30 and 60 minutes, according to the Personal Flotation Device Manufacturers Association website. Survival also varies based on body size, body fat percentage and movement in the water.