Jan van Amstel-class minesweeper

HNLMS Jan van Amstel underway
Class overview
Name	Jan van Amstel class
Builders	Gusto, Schiedam P. Smit, Rotterdam
Operators	Royal Netherlands Navy  Kriegsmarine  Royal Navy  Royal Australian Navy
Built	1936–1940
In service	1937–1961
Planned	12
Completed	9
Lost	5
Preserved	1
General characteristics
Type	Minesweeper
Displacement	460 long tons (467 t)
Length	56.8 m (186 ft 4 in)
Beam	7.8 m (25 ft 7 in)
Draft	2.2 m (7 ft 3 in)
Installed power	2 × Yarrow boilers 1,600 ihp (1,193 kW)
Propulsion	2 shafts, 2 × triple expansion engines
Speed	15 knots (28 km/h; 17 mph)
Complement	45
Armament	1 × single 3 in (76 mm) gun 2 × twin .50-calibre machine guns 40 sea mines

The Jan van Amstel class was a class of nine minesweepers of the Royal Netherlands Navy, built to serve in the Dutch East Indies and Dutch territorial waters in Europe. The class was originally planned to consist of 12 ships, but because of the German occupation of the Netherlands in the Second World War, three of the four ships that were still under construction were never completed.