NAVYPEDIA

Photo

RO2

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate	Modification
第18号艦 [18-go], 11.1924- 呂1 [RO1]			Kawasaki, Kobe	11.1918	28.7.1919	3.1920	stricken 1930	Fiat-Laurenti 1
第21号艦 [21-go], 11.1924- 呂2 [RO2]			Kawasaki, Kobe	11.1918	22.11.1919	4.1920	stricken 1930	Fiat-Laurenti 1
第31号艦 [31-go], 11.1924- 呂3 [RO3]			Kawasaki, Kobe	1.1920	10.3.1921	7.1922	stricken 1930	Fiat-Laurenti 2
第32号艦 [32-go], 11.1924- 呂4 [RO4]			Kawasaki, Kobe	1.1920	22.6.1921	5.1922	stricken 1930	Fiat-Laurenti 2
第33号艦 [33-go], 11.1924- 呂5 [RO5]			Kawasaki, Kobe	1.1920	17.9.1921	3.1922	stricken 1930	Fiat-Laurenti 2

Technical data

Displacement standard, t
Displacement normal, t	689 / 1047
Length, m	60.5 pp 65.6 oa
Breadth, m	6.10
Draught, m	18-go, 21-go: 4.20 31-33-go: 4.10
No of shafts	2
Machinery	2 FIAT diesels / 2 Savigliano electric motors
Power, h. p.	18-go, 21-go: 2800 / 1200 31-33-go: 2600 / 1200
Max speed, kts	18-go, 21-go: 13 / 8 31-33-go: 14 / 8
Fuel, t	diesel oil 58
Endurance, nm(kts)	3500(10) / 75(4)
Armament	1 x 1 - 7.7/87, 5 - 450 TT (3 bow, 2 stern, 8)
Complement	43
Diving depth operational, m	40

Standard scale images

Graphics

Project history

Fiat-Laurenti type. Built in Japan under drawings of Fiat-Laurenti. Ordered under the 1915-1916 programme (1st group) and 1918 programme (2nd group). Single-hulled.

Modernizations

1923, all: - 1 x 1 - 7.7/87; + 1 x 1 - 76/23 41-shiki

Naval service

No significant events.