Technical information
| Type | Minelayer |
| Displacement | 397 BRT |
| Length | 43 m |
| Complement | 26 men |
| Armament | 1 3" gun 2 .5" MG AA 30 mines |
| Max speed | 10 knots |
| Engines | Triple-expansion-engine, 1 shaft |
| Power | 360 HP |
| Notes on class | Former tug Willem van Braam, rebuilt as a survey vessel and renamed Hydrograaf. In 1935 Hydrograaf was renamed Bangkalan. Bangkalan was converted to auxiliary minelayer in February 1942 at the Naval Dockyard Soerabaja. |
All ships of the Bangkalan class
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| HNMS Bangkalan | Lost on 2 Mar 1942 | |
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See all Minelayer classes.

Royal Dutch Navy (more on