|Name||No||Yard No||Builder||Laid down||Launched||Comm||Fate|
|Otra||1950- N34||Nyland, Oslo||1/1939||1939||9/1939||captured by Germany 9.4.1940 (Togo), returned 5.1945, stricken 4.1963|
|Rauma||1950- N33||Nyland, Oslo||1/1939||1939||1/1940||captured by Germany 9.4.1940 (Kamerun), returned 5.1945, stricken 4.1963|
|Displacement standard, t||
|Displacement full, t||370|
|Length, m||51.00 pp 52.1 oa|
|Draught, m||1.83 normal 2.00 max|
|No of shafts||2|
2 VTE, 1 boiler
|Power, h. p.||900|
|Max speed, kts||
1 x 1 - 40/56 Bofors, 2 x 1 - 20/70 Oerlikon, 2 x 1 - 12.7/90, mechanical minesweeping gear, mines
Unique Norwegian purpose-built minesweepers of WWII, could take mines aboard.
Otra and Rauma were captured at Horten by German troops 9.4.1940, commissioned by Germans as Togo and Kamerun and returned to Norway after war. They were commissioned again in 1947 classified as minelayers.