ESFR sprinkler heads output rate - 100 gallons per minute. Droplet size - ESFR sprinkler heads release larger droplets of water with greater momentum than conventional heads. This combination of size and momentum allows the sprinkler droplet to penetrate a fire plume and reach the seat of a fire.
Definition of fleet for Students. 1  1 : a group of warships under one commander. 2  2 : a country's navy. 3  3 : a group of ships or vehicles that move together or are owned by one company a fishing fleet a fleet of taxis.
Updated March 30, 2017. The Navy has a large variety of ships in the fleet. The most well-known types are the aircraft carriers, submarines and destroyers. The Navy operates world-wide from many bases. The large ships -- aircraft carrier groups, submarines and destroyers -- travel around the world. Smaller ships such as the Littoral Combat Ship are based near their place of operations.