Since the PLA's victory in the civil war, a handful of ex-US LSTs were captured (or salvaged) from the Nationalists and impressed into service. These craft were built for US forces between 1942 and 1945. The first indigenously designed LST was completed in 1980 as the Yukan Type 072 class. Sea lift of the Yukan is 200 troops, 10 tanks and two LCVPs (up to 500 tons), as well as a heavy armament of 57 mm/37 mm/25 mm cannons. Production ended in 1995 after seven ships were built. A much improved class was the Yuting 072II, with nine ships built by 2001. Improvements included longer hull to accommodate an aft helicopter deck, larger internal flood bay for four LCVP and improved self defense artillery. The notable advantage of the Yuting II is its ability to operate helicopters. Despite being without hangar facilities, the heli-deck could operate two medium sized helicopters. With this combination of helicopter and LCVP operations, the Yuting could insert small groups of infantry from over the horizon. In addition, marine and army amphibious tanks/APCs have exercised swimming operations off LSTs while being a distance away from shore. This reduces the vulnerability of the LSTs from operating on beachheads. From 2002 onwards, another improved class, the 072III was seen in large numbers. This class features a redesigned superstructure. At least nine have been confirmed with more being built in shipyards.