Knots

Knots: A term used to designate the speed of ships; "25 knots" means that a ship is capable of travelling 25 nautical miles an hour. The nautical mile is 6,080 feet, as against 5,280 of the statute mile. About 25 knots is a speed of a very fast Dreadnought. A fast torpedo-boat destroyer often has a speed of 30 knots (34½ miles).