He informed Captain Harriman that the Enterprise was the only ship in range to rescue the Lakul, which was trapped in an energy field later identified as the Nexus. At Harriman's orders he released plasma from the warp nacelles to free the two transport ships but it wasn't successful. Later he informed the captain that the hull of the Lakul was collapsing and was hit by an explosion when the Enterprise-B was caught in the gravimetric distortion itself. Scotty took over his station. (Star Trek Generations)
Although the grey collar was used in the Star Trek films to signify both science officers and operations division personnel, his specialty of navigator indicated he belonged to the latter. In the novelThe Captain's Daughter, the navigator's name was given as Ensign Tommy Singer (β) and was he was said to have been an intimate friend of Demora Sulu's before his death. In Captain's Log: Sulu, his name was given as Lieutenant Commander Marruu (β).
As evidenced by the first draft script of Generations, the science officer was originally to have been a male. He expressed extreme excitement at the presence of the former Enterprise senior officers, commenting that he had read about their missions while he had been at grade school, though these exact same lines of dialogue are instead spoken by Captain Harriman in the final version of the film.