NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
第51号駆潜艇 [51-go], 5.1943 - 第251号駆潜特務艇 [251-go]			Tsurumi, Yokohama	12.1936	9.6.1937	9.1937	tug Eisen 1658 8.1944
第52号駆潜艇 [52-go], 5.1943 - 第252号駆潜特務艇 [252-go]			Tsurumi, Yokohama	1.1937	25.8.1937	10.1937	tug Eisen 1650 2.1944

Technical data

Displacement standard, t	170
Displacement full, t	175
Length, m	43.2 pp 44.5 wl 45.0 oa
Breadth, m	4.80
Draught, m	1.70
No of shafts	2
Machinery	2 diesels
Power, h. p.	3000
Max speed, kts	23
Fuel, t	diesel oil
Endurance, nm(kts)
Armament	1 x 1 - 40/62 HI 91-shiki, 2 DCT (18)
Electronic equipment	93-shiki sonar, 93-shiki hydrophone
Complement	41

Standard scale images

Project history

Built under 2nd Supplementary programme of 1934. In the design assignment the requirement to create smaller, comparing with Ch1 class, chaser, but not yielding to latter on efficiency, was put. One of ships (Ch53) as experiment received steam turbine propelling plant. Series has appeared unsuccessful, chasers were distinguished by bad manoeuvrability (designers corrected this lack only after aft end reconstruction and redesigning of a rudder).

Modernizations

1943: DC stowage was increased to 20 - 30.

Naval service

In May, 1943 Ch51-52 were re-rated to auxiliary submarine chasers Cha251-252 respectively and in 1944 were converted to tugs.