Corvette

A corvette (sometimes corvet) is a small, maneuverable, lightly armed warship, originally smaller than a frigate (2000+ tons) and larger than a coastal patrol craft or fast attack craft (500 or fewer tons), although many recent designs resemble frigates in size and role. During the Age of Sail, corvettes were smaller than frigates and larger than sloops-of-war, usually with a single gun deck.