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Submarines1990–presentProfile in progress
Diesel-electric attack submarine
Walrus-class submarine is a diesel-electric attack submarine. It was built by Rotterdamsche Droogdok Maatschappij. Reported operators include Royal Netherlands Navy.
Technical data
True scale
Sourced dimensions beside a 1.75 m human reference.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 29 Sept 2026 | 67.725 m | Wikipedia contributors | superseded |
| 29 Sept 2026 | 67.725 m | Wikipedia contributors | approved |
Walrus class
Rotterdamsche Droogdok Maatschappij
Royal Netherlands Navy
Dolfijn class Zwaardvis class
Orka class
ƒ 500 million per unit (1992)
1979–1992
1990–present
6
4
2
3
1
Diesel-electric attack submarine
2,450 t surfaced, 2,800 t submerged, 1,900 t standard
67.725 m (222 ft 2.3 in)
8.40 m (27 ft 7 in)
6.60 m (21 ft 8 in)
1 shaft (5 blades) 3 x SEMT Pielstick PA4 200 VG diesel engines 6,300 hp (4,700 kW) 1 x HOLEC electric motor 420-cell VARTA batteries
13 knots (24 km/h; 15 mph) surfaced, 21 knots (39 km/h; 24 mph) submerged
18,500 km (10,000 nmi) at 9 kn (17 km/h; 10 mph)
>300 m (980 ft)
49 to 52
Radars : Signaal / Decca 1229 Signaal ZW-07 Argo Phoenix I Sonar Systems : Thomson Sintra TSM 2272 Eledone Octopus GEC Avionics Type 2026 towed array Thomson Sintra DUUX 5 passive ranging and intercept Fire-control system : HSA GIPSY (SEWACO VIII)
4 × 21-inch (533 mm) torpedo tubes 20 × Honeywell Mk 48 torpedoes or Honeywell NT 37 C/D/E torpedoes UGM-84 Harpoon SSM 40 mines
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
Walrus-class submarine equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
NetherlandsNavy exact named equipment holdings: Walrus. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: SUBMARINES / SSK. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
Navy exact named class holdings of Walrus. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only, not a national or parent-force total or combat-readiness measure. Source role(s): SUBMARINES / SSK. No heading aggregate, carried armament, crew, payload, factory production or future order count inherited. The own fetched design source declares this exact class and its PDF operator country; ship capacities and fitted launcher/armament counts are retained as source scope, not added to hull quantities.
Reported count for Walrus class. Service scope: Royal Netherlands Navy – active fleet; does not replace a national total. 1 distinct quantity component(s) from the same source list; shared rowspan cells counted once. Explicit source inventory scope: active; no other stock status or total inferred. Count column(s): in service: 3. Origin: Netherlands. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.