Type 830 tug

the ship specifically developed as part of Project 518, the Chinese intercontinental ballistic missile program. Designed by Shanghai Jiao Tong University, the first ship entered service in December 1977, and a total of three were completed, and all of them remain active as early 2010s, despite their replacements have already entered service. In addition to regular tugging duties, Type 830 tug is also designed as a multifunction ship, including fire fighting ship, repair ship, and mooring tender.

Type 830 series in PLAN service are designated by a combination of two Chinese characters followed by three-digit number. The second Chinese character is Tuo (拖), meaning tug in Chinese, because these ships are tugs. The first Chinese character denotes which fleet the ship is service with, with East (Dong, 东) for East Sea Fleet, North (Bei, 北) for North Sea Fleet, and South (Nan, 南) for South Sea Fleet. However, the pennant numbers may have changed due to the change of Chinese naval ships naming convention. Specification:
 * Length (m):
 * Length (m): 84.9
 * Beam (m): 14
 * Draft (m): 5.5
 * Displacement (t): 3600
 * Speed (kt): 18.5
 * Rang (nm):
 * Crew: 120
 * Propulsion: two 10ESDZ 43/82B diesel engines @ 8600 hp
 * Armament: provisions for twin 37 mm gun