NAVYPEDIA

Photo

Oonami 1979

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
あやなみ [Ayanami]	DD103, 3.1983- ASU7004		Mitsubishi Zosen, Nagasaki	20.11.1956	1.6.1957	12.2.1958	TS 3.1983, stricken 12.1986
いそなみ [Isonami]	DD104, 3.1983- TV3502		Shin-Mitsubishi, Kobe	14.12.1956	30.9.1957	14.3.1958	TS 3.1983, stricken 7.1987
うらなみ [Uranami]	DD105, 3.1983- ASU7005		Kawasaki, Tokyo	1.2.1957	29.8.1957	27.2.1958	TS 3.1983, stricken 12.1986
しきなみ [Shikinami]	DD106, 3.1983- TV3503		Mitsui Zosen, Tamano	14.12.1956	25.9.1957	15.3.1958	TS 3.1983, stricken 7.1987
たかなみ [Takanami]	DD110, 3.1985- ASU7009		Mitsui Zosen, Tamano	8.11.1958	8.8.1959	30.1.1960	TS 3.1985, stricken 3.1989
おおなみ [Oonami]	DD111, 2.1987- ASU7013		Ishikawajima HI, Kobe	20.3.1959	13.2.1960	29.8.1960	TS 2.1987, stricken 3.1990
まきなみ [Makinami]	DD112, 2.1987- ASU7014		Iono HI, Maizuru	20.3.1959	25.4.1960	28.10.1960	TS 2.1987, stricken 3.1990

Technical data

Displacement standard, t	1720
Displacement full, t	2500
Length, m	109.0 wl
Breadth, m	10.7
Draught, m	3.70 light
No of shafts	2
Machinery	DD103-105: 2 sets Mitsubishi/Escher-Weiss geared steam turbines, 2 Mitsubishi/Combustion Engineering boilers DD106, 110, 111: 2 sets Mitsubishi/Escher-Weiss geared steam turbines, 2 Hitachi/Babcock & Wilcox boilers DD112: 2 sets Mitsubishi/Escher-Weiss geared steam turbines, 2 Kawasaki Jyuko BD boilers
Power, h. p.	35000
Max speed, kts	32
Fuel, t	oil
Endurance, nm(kts)	6000(18)
Armament	DD103-106, 110, 111: 3 x 2 - 76/50 Mk 33, 1 x 4 - 533 TT (8), 2 - 483 TT, 2 x 24 - 178 Hedgehog Mk 15 ASWRL, 2 DCT DD112: 3 x 2 - 76/50 Mk 33, 1 x 4 - 533 TT (8), 2 x 3 - 324 TT, 2 x 24 - 178 Hedgehog Mk 15 ASWRL, 2 DCT
Electronic equipment	DD103-106: OPS-1, OPS-2, SPG-34 radars, OQS-12 sonar DD110-112: OPS-1, OPS-15, SPG-34 radars, OQS-14 sonar, BLR-1 ECM suite
Complement	220

Standard scale images

Graphics

Project history

The Ayanami class were designed principally for ASW warfare and unofficially designated DDKs. Four ships were built under the 1955 programme, one under the 1957 and two under the 1958 programmes. The 76mm guns were US Mk 33s but the shields were uniquely Japanese. Later units of the class had a bulwark aft of the hull break. Reload torpedoes for the 533mm tubes were carried in racks on deck, which was standard practice in Japanese destroyers during the war. Ayanami was equipped with eight wash-down systems for removing radio-active fallout.

Modernizations

1965, Ayanami; 1966, Isonami; 1967, Takanami: + OQA-1 VDS sonar

1976, Isonami, Shikinami: - 1 x 4 - 533 TT (lecture hall was mounted on its place).

Naval service

All ships were later transferred to Fleet Training and Development Command as Special Use Auxiliaries (ASU) and Training Vessels (TV).