Real World article
(written from a Production point of view)

Brooks Gulledge served on board the USS Ranger CV-61 from 1983 to 1987 and appeared as one of the Enterprise CVN-65 sailors in Star Trek IV: The Voyage Home. During the filming of Star Trek IV, Petty Officer Gulledge volunteered to be one of the many extras. He can be seen on the hangar deck and two times while the Marines are chasing Pavel Chekov. Petty Officer Gulledge also had a speaking part in the scene where Chekov falls off the ship, saying "Hey Marine, what's going on down there?"

As an Aviation Boatswain Mate "E" Petty Officer 2nd Class, his duties were the launch and recovery of aircraft.