Dutch light cruisers Tromp and Jacob van Heemskerck

Tromp-class cruisers

Tromp as built

Jacob van Heemskerck as completed

Construction details

Name Tromp Jacob van Heemskerck

Dockyard NSM, Amsterdam* NSM, Amsterdam*

Ordered 1935 1935

Dockyardnumber 240 274

Laid down January 17 1936 October 31 1938

Launched May 24 1937 September 16 1939

Commissioned August 18 1938 May 10 1940 ( prematurely, trials were scheduled for June 1940 )

February 11 1941 (after refitting in UK)

Status Click here for her history Click here for her history.

Pennants D-28 (WW II)
KL-2
C-804
A-878 D-20 (WW II)
KL-1 ( June 15 1946)
KV-1 (January 21 1947)
C-803 (October 1950)
A-879 (January 15 1955)

* NSM: Nederlandse Scheepsbouw Mij

Specifications

Tromp Jacob van Heemskerck

Displacement 3350 tonnes standard

Crew 295, later 380 420

Dimensions 131.95 x 12.43 x 4.32 m

Armament 6 x 149 mm Bofors No. 11 (3x2)
4 x 40 mm Bofors (2x2)
4 x .50 Vickers * (2x2) 10 x 10,2 cm Mk 16 (5 x 2)
4 x 40 mm Vickers Mark 8 (1x4)
6 x 20 mm Hispano Suiza ** (6x1)

Added AA 4 x 75 mm (US origin)
4 x 40 mm Bofors***
6 x 20 mm Oerlikon 4 x 40 mm (1944/1945)****

ASW Howaldswerke hydrophone
4 DC-throwers
Asdic 4 DC-throwers
Asdic

Torpedoes 6 x 533 mm (2x3)
12 torpedoes ***** -

Radar
(incomplete list) Type 272 surface warning
Type 282 for Bofors 40 mm guns Type 285 AA-control
Type 272 surface warning
Type 282 for Bofors 40 mm guns

Air 1 Fokker C 11W floatplane -

* These were later replaced by 2 single 20 mm-guns, in addition to the other 6 Oerlikons.
** Later replaced by 20 mm Oerlikons
*** The original design had four twins. For some reason, Tromp only received 2. Heemskerck was to be completed with all four.
****These were replaced by two twin Bofors 40 mm mounts with type 282 radar. Two additional twin mounts were installated amidships
***** Tromp initially carried Dutch tubes for V⁵³ torpedoes, but the mounts were replaced by British in 1944/1945, for British Mark IX torpedoes. These were finally removed in 1946.

Armour

Turrets 25 - 12 mm

Side belt 15 mm

Inner side belt 20 - 30 mm

Main deck 25 mm

Lower deck 15 - 25 mm

Ammunition lifts 15- 25 mm

Propulsion details

Boilers 4 Yarrow 3 drum

Machinery 2 Parsons geared steam turbines*

Performance 56.000 shp

Max speed 32,5 knots**

Bunkerage 860 t

Shafts 2

* Built under license by N.V. Werkspoor, Amsterdam
**Tromp reached 62.160 shp and 35,06 knots on her trials.

Related Links

Tromp-class cruisers photo special

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Construction details
Name	Tromp	Jacob van Heemskerck
Dockyard	NSM, Amsterdam*	NSM, Amsterdam*
Ordered	1935	1935
Dockyardnumber	240	274
Laid down	January 17 1936	October 31 1938
Launched	May 24 1937	September 16 1939
Commissioned	August 18 1938	May 10 1940 ( prematurely, trials were scheduled for June 1940 ) February 11 1941 (after refitting in UK)
Status	Click here for her history	Click here for her history.
Pennants	D-28 (WW II) KL-2 C-804 A-878	D-20 (WW II) KL-1 ( June 15 1946) KV-1 (January 21 1947) C-803 (October 1950) A-879 (January 15 1955)
* NSM: Nederlandse Scheepsbouw Mij

Specifications
	Tromp	Jacob van Heemskerck
Displacement	3350 tonnes standard
Crew	295, later 380	420
Dimensions	131.95 x 12.43 x 4.32 m
Armament	6 x 149 mm Bofors No. 11 (3x2) 4 x 40 mm Bofors (2x2) 4 x .50 Vickers * (2x2)	10 x 10,2 cm Mk 16 (5 x 2) 4 x 40 mm Vickers Mark 8 (1x4) 6 x 20 mm Hispano Suiza ** (6x1)
Added AA	4 x 75 mm (US origin) 4 x 40 mm Bofors*** 6 x 20 mm Oerlikon	4 x 40 mm (1944/1945)****
ASW	Howaldswerke hydrophone 4 DC-throwers Asdic	4 DC-throwers Asdic
Torpedoes	6 x 533 mm (2x3) 12 torpedoes *****	-
Radar (incomplete list)	Type 272 surface warning Type 282 for Bofors 40 mm guns	Type 285 AA-control Type 272 surface warning Type 282 for Bofors 40 mm guns
Air	1 Fokker C 11W floatplane	-
* These were later replaced by 2 single 20 mm-guns, in addition to the other 6 Oerlikons. Later replaced by 20 mm Oerlikons * The original design had four twins. For some reason, Tromp only received 2. Heemskerck was to be completed with all four. **These were replaced by two twin Bofors 40 mm mounts with type 282 radar. Two additional twin mounts were installated amidships *** Tromp initially carried Dutch tubes for V⁵³ torpedoes, but the mounts were replaced by British in 1944/1945, for British Mark IX torpedoes. These were finally removed in 1946.

Armour
Turrets	25 - 12 mm
Side belt	15 mm
Inner side belt	20 - 30 mm
Main deck	25 mm
Lower deck	15 - 25 mm
Ammunition lifts	15- 25 mm

Propulsion details
Boilers	4 Yarrow 3 drum
Machinery	2 Parsons geared steam turbines*
Performance	56.000 shp
Max speed	32,5 knots**
Bunkerage	860 t
Shafts	2
* Built under license by N.V. Werkspoor, Amsterdam **Tromp reached 62.160 shp and 35,06 knots on her trials.