A U.S. Army National Guard video by Staff Sgt. Adam Fischman shows members of the Army National Guard’s 3rd Battalion, 20th Special Forces Group (Airborne) combat dive team helocast at night from a CH-47 Chinook helicopter at Naval Station Mayport, May 1, 2015. The divers were performing closed circuit dive training, helocasting and additional maritime training required to complete their re-qualification and familiarization.