Jan van Amstel-class minesweeper

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.

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)
Propulsion	2 × Yarrow 3-drum boilers 2 × Stork triple expansion engines, 1,600 ihp (1,193 kW) 2 shafts 110 tons fuel oil
Speed	15 knots (28 km/h; 17 mph)
Complement	45
Armament	1 × 3 in (76 mm) gun 2 × twin 0.50-inch Vickers machine guns 40 sea mines

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.

The ships could also be used as minelayers. The construction of the ships took place in two different shipyards, four by Gusto, Schiedam and five by P. Smit, Rotterdam.