The Navy says today's crash happened as the helicopter was conducting routine flight operations.
Guided-missile destroyer USS Dewey rescued the pilots and air crewman, who were uninjured.
The MH-6R Seahawk helicopter is assigned to Helicopter Marine Strike Squadron 78. The Sea Hawk is a twin-engine helicopter based aboard the Dewey.
The Dewey, the helicopter and the USS Sterett destroyer are deployed as part of the Sterett-Dewey Surface Action Group, which departed San Diego for the Western Pacific on March 31.