Anti-Submarine WarfareThis film is about the story of the destroyer escorts and their services in the U.S. Navy it shows the construction and launch of the USS Frament (DE-677) in June 28 1943 and USS Brennan (DE-13) in August 22 1942.
The Destroyer Escort was the United States Navy mid-20th century classification for a 20-knot (23 mph) warship designed with endurance to escort mid-ocean convoys of merchant marine ships. Kaibōkan were designed for a similar role in the Imperial Japanese Navy. The Royal Navy and Commonwealth forces identified such warships as frigates, and that classification was widely accepted when the United States redesignated destroyer escorts as frigates in 1975. Destroyer escorts, frigates and kaibōkan were mass-produced for World War II as a less expensive anti-submarine warfare alternative to fleet destroyers.
Post war destroyer escorts and frigates were larger than those produced during wartime, with increased anti-aircraft capability, but remained smaller and slower than post war destroyers. As Cold War destroyer escorts became as large as wartime destroyers, the United States Navy converted some of their World War II destroyers to escort destroyers.
Credit to : PeriscopeFilm