Both are small warships, with the corvette the smaller of the two. A corvette is typically a coastal or littoral vessel with limited endurance; a frigate is ocean-going, carries more armament and usually operates a helicopter. As with all warship classes, the boundary varies by navy.
The core difference
- corvette — the smallest class generally counted as a warship proper, often under 2,000 tonnes, built for coastal patrol and short deployments.
- frigate — ocean-going, typically 3,000–6,000 tonnes, with a helicopter, longer endurance and heavier sensors and weapons.
What the size buys
The practical differences follow from displacement:
- Endurance — a frigate can stay at sea for weeks and cross oceans; a corvette is generally tied closer to base.
- Aviation — a frigate normally has a hangar and a helicopter, which transforms its anti-submarine reach. Most corvettes have at best a landing deck.
- Sea-keeping — a larger hull handles heavy weather far better, which is a capability limit as much as a comfort one.
The age of sail
Both are old names with different original meanings. A frigate was a fast, single-gun-deck ship used for scouting and raiding. A corvette was smaller still, below the frigate, used for escort and dispatch work — the French term for a class the Royal Navy called a sloop-of-war.
Why small navies favour corvettes
A corvette gives a navy a credible armed vessel at a fraction of a frigate's cost and crew. For countries whose task is patrolling their own waters rather than deploying across oceans, that trade is deliberate rather than a compromise.
Frequently asked questions
What is the difference between a frigate and a corvette?
A corvette is smaller, typically coastal, with limited endurance. A frigate is ocean-going, carries heavier armament and usually operates a helicopter.
Why do some navies build corvettes instead of frigates?
Cost and crew. A corvette provides a credible armed vessel far more cheaply, which suits navies whose task is patrolling home waters rather than ocean deployment.
Were corvettes and frigates different in the age of sail?
Yes. A frigate was a fast single-gun-deck ship for scouting and raiding; a corvette was smaller, used for escort and dispatch — the Royal Navy called the type a sloop-of-war.