Tromp-class cruiser

	Lead of her class Tromp c. 1938
Class overview
Name	Tromp class
Builders	Nederlandsche Scheepsbouw Mij
Operators	Royal Netherlands Navy
Built	1936–1940
In commission	1938–1969
Planned	2
Completed	2
Retired	2
General characteristics
Type	Flotilla leader or light cruiser
Displacement	3,787 long tons (3,848 t)
Length	131.9 m (433 ft)
Beam	12.4 m (41 ft)
Draught	4.6 m (15 ft)
Installed power	56,000 shp (42,000 kW)
Propulsion	2 geared steam turbines; 4 boilers; 2 shafts;
Speed	34.5 knots (63.9 km/h; 39.7 mph) achieved; 33.5 knots (38.6 mph; 62.0 km/h) design;
Armament	Tromp (at launch):; 6 × 150 mm (5.9 in) (3×2); 4 × 40 mm (2×2); 6 × 533 mm (21 in) torpedo tubes (2×3); 4 × 1.3 cm (.5 in) (2×2); Jacob van Heemskerk (at launch):; 10 × 102 mm (4 in) guns (5×2); 6 × 20 mm (0.79 in); 1 × QF 2-pounder (1×4);
Armour	15–25 mm (0.59–0.98 in) main deck; 16–25 mm (0.63–0.98 in) second deck; 16 mm (0.63 in) turrets; 13 mm (0.51 in) conning tower;
Aircraft carried	1 × Fokker C.XIW floatplane (Tromp)

The Tromp-class was a two-ship series of light cruisers operated by the Royal Netherlands Navy between 1939 and 1969. Officially designated as flotilla leaders, the ships were built to also operate as torpedo and scout cruisers. The two ships, Tromp and Jacob van Heemskerck, were intended to defend the Dutch East Indies against Japan. By the start of World War II, only Tromp was in service: the uncompleted Heemskerck fled to the United Kingdom and was converted into an air-defense cruiser following the Invasion of the Netherlands. The two ships operated with either British or American fleets throughout Asia for the rest of the war, and participated in Allied offensives throughout the Indonesian Archipelago and western Pacific. During the early Cold War, the ships participated in several fleet maneuvers before they were reassigned as training ships and decommissioned in the late 1960s.

Class overview
Lead of her class Tromp c. 1938
Name	Tromp class
Builders	Nederlandsche Scheepsbouw Mij
Operators	Royal Netherlands Navy
Built	1936–1940
In commission	1938–1969
Planned	2
Completed	2
Retired	2
General characteristics
Type	Flotilla leader or light cruiser
Displacement	3,787 long tons (3,848 t)
Length	131.9 m (433 ft)
Beam	12.4 m (41 ft)
Draught	4.6 m (15 ft)
Installed power	56,000 shp (42,000 kW)
Propulsion	2 geared steam turbines 4 boilers 2 shafts
Speed	34.5 knots (63.9 km/h; 39.7 mph) achieved 33.5 knots (38.6 mph; 62.0 km/h) design
Armament	Tromp (at launch): 6 × 150 mm (5.9 in) (3×2) 4 × 40 mm (2×2) 6 × 533 mm (21 in) torpedo tubes (2×3) 4 × 1.3 cm (.5 in) (2×2) Jacob van Heemskerk (at launch): 10 × 102 mm (4 in) guns (5×2) 6 × 20 mm (0.79 in) 1 × QF 2-pounder (1×4)
Armour	15–25 mm (0.59–0.98 in) main deck 16–25 mm (0.63–0.98 in) second deck 16 mm (0.63 in) turrets 13 mm (0.51 in) conning tower
Aircraft carried	1 × Fokker C.XIW floatplane (Tromp)