Category:Hr.Ms. Hydrograaf (ship, 1926)

English: Originally tug Willem van Braam; converted to survey vessel Hydrograaf in 1935 and commissioned by the Dienst der Scheepvaart. Under conversion to auxiliary minelayer Bangkalan in February, 1942 at the Naval Dockyard Soerabaja. Damaged February 18, 1942 in Soerabaja by air attack, scuttled by own crew March 2, 1942. Salvaged by the Japanese and commissioned. Found post-war and commissioned as buoy vessel Bangkalan in 1946. Turned over to Indonesian government in 1949 or 1950.