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The Thetis class ocean patrol vessel, also called Stanflex 3000, is a class of large scale patrol vessels built for the Royal Danish Navy for the purpose of fisheries protection, as well as search-and-rescue and ice reconnaissance. The class is comprised four ships, all built and commissioned in the early 1990s. The ships tasks are mainly maintenance of soverenignty, search and rescue, fischery inspection and support to local (mainly Greenland) authorities.
The operation areas are normally Greenland and Faroe Islands, but it is not uncommon to see the vessels of this class on Icelandic territorial waters as well as in resident danish waters.

Contents 1 List of ships 2 Specifications 2.1 Design Notes 3 Crew 4 References

Pennant number	Name	Int'l c/s	Shipyard	Laid down	Launched	In service
F357	Thetis	OUEU	Svendborg	October 10, 1988	July 14, 1989	July 1, 1991
F358	Triton	OUEV	Svendborg	June 27, 1989	March 16, 1990	December 2, 1991
F359	Vædderen	OUEW	Svendborg	March 19, 1990	December 21, 1990	June 9, 1992
F360	Hvidbjørnen	OUEX	Svendborg	January 2, 1991	October 11, 1991	November 30, 1992

• Length: 112.50 m
• Beam: 14.40 m
• Draft: 6.00 m
• Tonnage: 3,500
• Speed: 21.5 knots
• Propulsion:
  • Main engines: 3 x MAN-B&W 12v28/32A-D à 2940 kW (3990 hk)
  • 1 shared reduction gear for propeller and shaft generator (PTO to shaft generator = 1800 kW)
  • 1 electrical Brunvoll azimuth thruster (800 kW)
  • 1 electrical Brunvoll bov thruster (600 kW)
• Auxiliary engines:
  • Diesel generator sets: 3 x Detroit Diesel GM 16V 7163-7305 à 460
  • Emegerency generator set: 1 x Detroit Diesel 6L-71N 1063-7005 à 120 Kw
• Electronics:
  • 1 Terma Scanter Mil 009 navigational radar
  • 1 Furuno FR-1505 DA surface search radar
  • 1 Plessey AWS-6 air search radar
  • 1 SaabTech Vectronics 9LV 200 Mk 3 fire control system
  • 1 SaabTech CTS-36 hull-mounted sonar
  • Thales TMS 2640 Salmon variable depth sonar
  • FLIR Systems AN/AAQ-22 SAFIRE thermal imager
• Countermeasures:
  • 1 Thales Defense Ltd Cutlass radar warning receiver
  • 1 Thales Defense Scorpion radar jammer
  • 2 Sea Gnat launchers (for chaff and flares)
• Communication: Link 11 (F357 only)
• Armament:
  • 1 76-mm 62-cal. OTO Melara Super Rapid DP
  • 1 or 2 single 20-mm 70-cal. Oerlikon AA
  • 2 depth charge racks
• Air complement:
  • 1 Lynx helicopter (capable of being stored in hangar)
  • 1 heavy-duty helicopter can be stored on helicopter pad
• Endurance: 8,300 nautical miles

The ships each have double-skinned ice-reinforced hulls, designed such that the ships can break through 80 cm of solid ice. F357 has under gone a conversion to become the fleet's flagship. The conversion included adding Link 11 for communications, as well as other communication equipments. The 20-mm AA guns are not usually mounted, and the Danish Navy has plans in place to upgrade the ships if funding were allotted. Such upgrades would include adding Sea Sparrow SAM modules, Harpoon missile launchers and decoy launchers.

Officerers: 9
Petty officers: 9
Ordinary seamens: 34
Helicopter crew: 3-4
Doctors: 1-2
Passangers: 12
Conscripts: 18

• 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.