The Chinese Type 312 class minesweeper was also known as Futi class.^[1] It was the first remote minesweeping drone, and was successfully used in the Vietnam War.^[2]

Class overview
Name	Type 312 class minesweeper
Builders	Hudong-Zhonghua Shipyard
Operators	People's Liberation Army Navy
General characteristics
Type	Drone minesweeper
Displacement	47 t (46 long tons; 52 short tons)
Length	20.9 m (68 ft 7 in)
Beam	3.9 m (12 ft 10 in)
Draught	2.1 m (6 ft 11 in)
Propulsion	1 × Type 12V150C diesel engine 300 hp (224 kW) 1 shafts
Speed	25 knots (46 km/h; 29 mph)
Range	144 nmi (267 km; 166 mi) at 12 kn (22 km/h; 14 mph)
Complement	3 (when manned)
Armament	Machine gun mount available for manned operation

Although originally designed as a minesweeping drone, the Type 312 can also be manned by a 3-man crew as a regular minesweeper. The chief designer was Mr. Diao Haiguang (刁海光) of the 710th Institute, and from the start of the project to the completion of the first two units (two units are being built simultaneously), it only took less than two years when the first two units entered the service for the People's Liberation Army Navy. Due to its small size, this class is maintained on land and thus is in better conditions than most of other larger boats and ships in the reserve fleet. The drone can be remotely operated from more than 5 km (3.1 mi) away.