A frigate was a type of sea-faring ship, often used in combat.
HMS Hades was originally a forty-two-gun frigate. It was decommissioned in 1869 and bought by Sir Henry Montague, stripped the ship of its weapons and converted the armoury into a surgical theatre. (PROSE: The Baby Farmers)
The Seventh Doctor and Chris Cwej sailed on a British man-of-war that had encountered a French frigate. (PROSE: No Room)
Captain Henry Avery's boat Fancy was a frigate. (TV: The Curse of the Black Spot)