Tuozhong-class tug

The Tuozhong class tug is a class of four Chinese ocean-going tugs built by Hudong-Zhonghua Shipbuilding.for People's Liberation Army Navy (PLAN) in the late 1970s. .These tugs are rescue and salvage tugs equipped with 35 ton towing winch and high-capacity pump. In addition to perform tug duties, Tuozhong class is also designed as a firefighting ship and repair ship for emergency repairs.

Specifications:
 * Displacement (t): 3600
 * Length (m): 84.9
 * Width (m): 14
 * Draft (m): 5.5
 * Speed (kt): 18.5
 * Propulsion: 2 Type 9 ESDZ 43/82B diesel @ 9000 hp
 * Armament: twin 37 mm gun x 2
 * Radar: 1 former-USSR Fine Curve navigational radar
 * Crew: 60

Daozha class
The Daozha class is an upgrade of the Tuozhong class and it is also built by Hudong-Zhonghua Shipbuilding. The Daozha class is slightly larger than the Tuozhong class and requires twice the manpower to operate it due to increased complexity resulting from additional equipment added. Daozha class entered service with PLAN in 1993.

Specifications:
 * Displacement (t): 4000
 * Length (m): 84
 * Width (m): 12.6
 * Draft (m): 5.4
 * Speed (kt): 18
 * Propulsion: 2 diesel engines @ 8600 hp
 * Armament: Provision for twin 37 mm gun
 * Radar: 1 navigational radar
 * Crew: 125