RO60 1941
| Name | No | Builder | Laid down | Launched | Comp | Fate |
| 第59号艦 <59-go>(No59), 11/1924- 呂60 <RO60> | Mitsubishi, Kobe | 12/1921 | 22/12/1922 | 9/1923 | wrecked 29/12/1941 | |
| 第72号艦 <72-go>(No72), 11/1924- 呂61 <RO61> | Mitsubishi, Kobe | 6/1922 | 19/5/1923 | 2/1924 | sunk 31/8/1942 | |
| 第73号艦 <73-go>(No73), 11/1924- 呂62 <RO62> | Mitsubishi, Kobe | 9/1922 | 19/9/1923 | 7/1924 | surrendered 8/1945, BU 1946 | |
| 呂63 <RO63> (ex-第84号艦 <84-go>(No84)) | Mitsubishi, Kobe | 4/1923 | 24/1/1924 | 12/1924 | surrendered 8/1945, BU 1946 | |
| 呂64 <RO64> (ex-第85号艦 <85-go>(No85)) | Mitsubishi, Kobe | 10/1923 | 19/8/1924 | 4/1925 | sunk 12/4/1945 | |
| 呂65 <RO65> (ex-第86号艦 <86-go>(No86)) | Mitsubishi, Kobe | 11/1923 | 25/9/1925 | 6/1926 | sunk 4/11/1942 | |
| 呂66 <RO66> | Mitsubishi, Kobe | 12/1925 | 25/10/1926 | 7/1927 | collision 17/12/1941 | |
| 呂67 <RO67> | Mitsubishi, Kobe | 3/1925 | 18/3/1926 | 12/1926 | damaged 22/6/1945, never repaired | |
| 呂68 <RO68> (ex-第87号艦 <87-go>(No87)) | Mitsubishi, Kobe | 2/1924 | 23/2/1925 | 10/1925 | surrendered 8/1945, BU 1946 |
|
Displacement standard, t |
988 |
|
Displacement normal, t |
996 / 1322 |
|
Length, m |
74.1 pp 76.2 oa |
|
Breadth, m |
7.38 |
|
Draught, m |
3.77 |
|
No of shafts |
2 |
|
Machinery |
2 Vickers diesels / 2 electric motors |
|
Power, h. p. |
2400 / 1600 |
|
Max speed, kts |
16.5 / 9 |
|
Fuel, t |
diesel oil 75 |
| Endurance, nm(kts) | 7000(10) / 85(4) |
| Armament |
1 x 1 - 76/40 88-shiki, 1 x 1 - 7.7/87, 6 - 533 TT (bow, 10) |
|
Complement |
47 - 60 |
|
Diving depth operational, m |
60 |
Ship project history: Vicker L(4) or (3 mod) type. Development of Vickers L(3), last Japanese licence-built submarines. They differed from predecessors by strengthened torpedo armament and also an arrangement of the gun, transferred from CT to a deck. Built under the 1921-1928 program. Orders for No60 and 61 submarines were cancelled in 1921.
In 1942 RO62-64, 67 and 68 ere re-rated as training submarines.
Modernizations: None.
Naval service: RO60 29/12/1941 ran ashore at northern end of Kwajalein, wrecked by a bad weather. RO61 was sunk 31/8/1942 at Atka (Aleutians) by American destroyer Reid and aircraft. RO65 ran ashore during evasion from attack of American aircraft 4/11/1942 at Kiska, later she was destroyed by aircraft. RO66 foundered 17/12/1941 after collision with RO62 N off Wake. RO64 was lost on a mine in Kobe area 12/4/1945.
RO62 was damaged 7/2/1942 at collision with RO61. RO67, under some data, 4/4/1945 was hard damaged on a mine in Internal Sea of Japan, 22/6/1945 she was hard damaged by American Army aircraft in Kure and stricken 20/7/1945.
RO68 1925
© Ivan Gogin, 2008-10