Crimson's correct. First Officer is who takes charge when the captain is not available as well as being the captain's chief advisor. It's the same thing as a First Mate.
Chief Science Officer heads the upkeep of computer systems and communications equipment, as well as guiding scientific research.
Chief Engineer keeps the ship running.
Chief Medical Officer is obvious, I hope.
Chief Science Officer heads the upkeep of computer systems and communications equipment, as well as guiding scientific research.
Chief Engineer keeps the ship running.
Chief Medical Officer is obvious, I hope.