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Thetis-class ocean patrol vessel
RDN F357 Thetis
HDMS Thetis
Class overview
Builders: Svendborg Skibsværft
Operators: Naval Ensign of Denmark.svg Royal Danish Navy
Preceded by: Hvidbjørnen class
In commission: 1991–
Planned: 4
Completed: 4
Active: 4
General characteristics
Type: Ocean patrol frigates[1][2]
Displacement: 3,500 tons,standard
Length: 112.3 m (368 ft 5 in)
Beam: 14.4 m (47 ft 3 in)
Height: 37.0 m (121 ft 5 in)
Draft: 6.0 m (19 ft 8 in)
Installed power: 3 x Detroit Diesel GM 16V 7163-7305 à 460
1 x Detroit Diesel 6L-71N 1063-7005 à 120 Kw (EMG)
Propulsion: 3 x MAN B&W Diesel 12v28/32A-D à 2940 kW (3990 hk), single shaft
1 x Brunvoll azimuth thruster (800 kW)
1 x electrical Brunvoll bow thruster (600 kW)
Speed: 21.8 kn (40.4 km/h)
Range: 8.700 nmi (16.112 km) at 15 kn (28 km/h)
Endurance: 60 days
Boats & landing
craft carried:
2 x 7 m (23 ft) RHIBs
Complement: 47-60 depending on role + aircrew etc.
Sensors and
processing systems:
1 x Terma Scanter Mil 009 navigational radar
1 x Furuno FR-1505 DA surface search radar
1 x Plessey AWS-6 air search radar
1 x SaabTech Vectronics 9LV 200 Mk 3 fire control system
1 x SaabTech CTS-36 hull-mounted sonar
Thales TMS 2640 Salmon variable depth sonar
FLIR Systems AN/AAQ-22 SAFIRE thermal imager
Electronic warfare
& decoys:
1 x Thales Defense Ltd Cutlass radar warning receiver
1 x Thales Defense Scorpion radar jammer
2 x Sea Gnat launchers (for chaff and flares)
Armament: 1 x 76-mm 62-cal. OTO Melara Super Rapid DP
7 x 12.7 mm heavy machine guns
4 x 7.62 mm light machine guns
1 x depth charge rack and MU90 Advanced Lightweight Torpedo for anti-submarine warfare
Aircraft carried: 1 x Westland Lynx Mk.90B helicopter
Aviation facilities: Aft helicopter deck and hangar

The Thetis-class ocean patrol vessels or Ocean patrol frigates,[1][3] also called Stanflex 3000, is a class of large patrol vessels built for the Royal Danish Navy. The class comprises four ships, all built and commissioned in the early 1990s. The ships' tasks are mainly maintenance of sovereignty, search and rescue, fishery inspection and support to local (mainly Greenlandic) authorities. The operation areas are normally Greenland and the Faroe Islands, but the vessels also operate near Iceland on transit between Greenland and the Faroe Islands, and near Denmark.


The ships each have double-skinned ice-reinforced hulls so that the ships can break through 80 centimetres (31 in) of solid ice. Thetis has undergone a conversion, first to participate in the CANUMAS-project, and later to become the fleet's flagship, a role that ended in SEP 2007. The Danish Navy has retrofitted the vessels with 12.7-millimetre (0.50 in) heavy machine guns, Stinger launchers and decoy launching systems. The ships can carry and use multiple StanFlex mission modules.

In the most common role (ocean patrol), the standard base crew is 47 persons and 16 conscripts,[4] but in either command ship role or more warfare heavy roles, the base crew is expanded to 60 persons plus 4 aircrew for the Westland Lynx Mk.90B and one or two doctors. Accommodation is available for 101 personnel in all.

List of shipsEdit

Name Pennant
Int'l c/s Shipyard Laid down Launched In service Christened by Decommissioned
Thetis F357 OUEU Svendborg Skibsværft 10 October 1988 14 July 1989 1 July 1991 Frederik, Crown Prince of Denmark -
Triton F358 OUEV Svendborg Skibsværft 27 June 1989 16 March 1990 2 December 1991 Poul Schlüter, Prime Minister of Denmark -
Vædderen F359 OUEW Svendborg Skibsværft 19 March 1990 21 December 1990 9 June 1992 Atli Dam, Prime Minister of the Faroe Islands -
Hvidbjørnen F360 OUEX Svendborg Skibsværft 2 January 1991 11 October 1991 30 November 1992 Lars Emil Johansen, Prime Minister of Greenland -


  • Thetis class (from Naval Technology)
  • Wertheim, Eric. The Naval Institute Guide to Combat Fleets of the World, 2005–2006; Their Ships, Aircraft, and Systems. US Naval Institute Press. Annapolis, Maryland. 2005.
  • Thetis class (From Royal Danish Navy)

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