|Dolfijn (4), Walrus (2) and Zeeleeuw (2) in 1996. Note the new snort exhaust diffuser on the sail of the second submarine|
For additional photos and information please check the 'related pages list' at the bottom of this page.
|Boat||Walrus (2)||Zeeleeuw (2)||Dolfijn (4)||Bruinvis|
|Type||Conventional attack submarine|
|Class name||Walrus (2). Named after first of class. Second class named Walrus|
|Navy estimates||Money set aside in 1975.|
|Building contract||16 June/Aug 1979||17 Dec 1979||16 Aug 1985||16 Aug 1985|
|Laid down||11 Oct 1979||24 Sep 1981||12 June 1986||14 Apr 1988|
|Launched||28 Oct 1985||20 June 1987||25 Apr 1990||25 4/5 1992|
|Re-launched||13 Sep 1989||-||-||-|
|Trials||4 Mar - 25 Oct 1993|
|Commissioned||25 Mar 1992||25 Apr 1990||29 Jan 1993||5 July 1994|
|Decommissioned||Early 21 century|
|Design||Dutch: RDM, NEVESBU,
VEREBUS, Royal Navy.
Improved Zwaardvis (2)
|Shipyard||Rotterdamse Droogdok Maatschappij, Rotterdam|
|Cost||Original 212,500,000 Dutch guilders; later raised to 470,000,000 guilders|
|Le x Be x Dr||67.73 m x 8.4 m x 6.6 m (7 m according to some sources)|
|Displ. sur/sub/stnrd||2450 t / 2800 t / 1900 t|
|Engines||Three 12-cylinder 4-stroke PA4 200 VG SEMPT-Pielstick diesel engines, 4.63 MW, 6300 hp(m), 3 alternators 2.88 MW.|
|Main motor||One Holec electric motor, 6910 apk, 5.1 MW|
|Batteries||Varta, 420 cells
(German Exide type has also been reported)
|In July 2000 the Dutch government reported an order for batteries from Exide Deutschland.|
|Shaft/Propeller||1 shaft / 5 blades (some sources report 7 blades, which is incorrect)|
|Speed surf/subm||13 kts / 21 kts|
|Range snorting||10000 nm at 9 kts|
|Diving depth||Officially >300 m.
Exact diving depth is classified but probably >400 m
|Complement||50 up to 55 is being reported. 52
according to the Dutch Navy.
10 off, 12 sub. off., 15 corp., 15 enlisted.
Latest figures of the Dutch Navy indicate a crew of 55. 9 Officers, 12 Sub-officers, 34 Corporals and sailors.
|Torpedo tubes||4 x 21" bow. Mk 67 NL mod
Water-ram discharge from Vickers, Canada
Mk 19 turbine ejection pump (TEP).
|Torpedo type||Honeywell Mk 48 Mod 4 and Mk 48 ADCAP.|
|Honeywell NT 37 C/D/E. Probably only kept on stock at the shore base.|
|Missiles||SSM: McDonnell Douglas
The class can fire the Sub-Harpoon, but none are bought.
|Armament||20 torpedoes or Sub-Harpoon. 40 mines in
lieu of torpedoes.
2001: Unconfirmed: Sub-Harpoon not used anymore
|Decoys||Type and number unknown.|
|Fire control||HSA SEWACO VIII action data automation, which is the same as HSA GIPSY data/combat system.|
|GTHW integrated Harpoon and Torpedo FCS|
|Radar||Surface navigational?: Signaal /
Surface search: Signaal ZW-07.
|Sonar||Also read the 'notes'|
|Towed array: GEC
Avionics / Dutch type 2026 with Signaal display processor,
Marconi beam-former and an Ameeco wet end; passive
search; very low frequency.
LRS, Long Range Sonar
|Hull mounted: Thomson Sintra Elodone Octopus; Thomson-Sintra TSM 2272. passive/active search/attack; medium frequency; 64 stave|
|?ETBF and Acoustic
Telemetry Fenelon; Thomson-Sintra TSM 2225
|Thomson Sintra DUUX 5, passive ranging and intercept.|
|Probably: Flank array FAS 3-1A.|
|Probably: Hybrid flank array. Using commercial Interstate Electronics Corp. spectrum analyzer, an HP-1311A display unit , and TNO's interface type JO116 electronic unit.|
|Probably: EDO 1550 obstacle avoidance sonar.|
|ESM||Radar warning: Argo Phoenix I .
According to some sources: Argos 700 radar warning.
|In July 2000 the Dutch government reported an order for DR3000 systems from Thomson-CSF Detexis.|
|In order to replace the original
Kollmorgen antenna's ACAL Nederland delivered an improved ESM
early-warning antenna in 1994.
These antennas are installed in a watertight dome on the search perisscope. A GPS antenna is included in the same dome.
|In 2000 ACAL Nederland delivered an upgrade. The upgrade consists of an expansion as well as improvement of the antenna specifications.|
type 76, designation for this
Walrus (2) version is type 979
Attack: Kollmorgen type 76, designation for this Walrus (2) version is type 978
|Some sources report 2 x Barr & Stroud, which is incorrect.|
|Communications||Late 1998: Radio Holland Marine GMDSS communications equipment, details.|
- Equipped with Hydraudyne drive
|Walrus(2) class related pages|
|Walrus (2) class specifications|
|Walrus (2) Class Submarines article|
|Various photo pages|
|Walrus (2) class video footage|
|Walrus(2) class related books|
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