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Tripartite Class Belgian Minehunter

Tripartite Class

Multi-Role Response Vessel (MRRV)
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Basic Information
Name
Tripartite Class Belgian Minehunter
Designation
Tripartite Class
Alternate Designation
Tripartite Class
Equipment Type
Multi-Role Response Vessel (MRRV)
Manufacturer
Date of Introduction
1985
Description

Originally ten ships were ordered for the Belgian Navy, with the option for five more that was never activated. The Polyship consortium was organized to direct the building program, however, the consortium was dissolved, leading to delays in the construction of the minehunters. This led to the vessels being reordered this time from Béliard Shipyard, which constructed the hulls at their yard in Ostend, Belgium before completing the minehunters at Rupelmonde. Differences between the Belgian and French versions of the class include a smaller displacement at 519 tons (511 long tons) standard and 574 tones (565 long tons) at full load. They are equipped with an Atlas Elektronik IMCMS combat data system. When Minehunting, the Belgian vessels carry six divers and can have a portable decompression chamber installed abaft the forecastle break. All vessels in the class are named after flowers and are thus sometimes called the "Flower" or Aster class. In 2001 the remaining Belgian minehunters had their engines upgraded. All remaining Belgian vessels have undergone an extensive upgrade during 2004–2008 involving replacement of the anti-mine warfare equipment. This included receiving the same sonar package as the French versions. The complement of the Belgian ships varies between 33 and 46 depending on the mission. Ships in class (Belgium) In 1993, three of the vessels (Iris, Fuschia, and Dianthus) were paid off and laid up until being sold in 1997 to France. Crocus was modified into an ammunition transfer vessel the same year. Myosotis was converted to an ammunition transport before being taken out of service in 2004 and was sold to Bulgaria in 2009.

Naval & Littoral Specifications
Crew 33
Beam 9.00 m
Draft 2.60 m
Variants
Aster Commissioned: 1985 Status: Active
Bellis Commissioned: 1986 Status: Active
Crocus Commissioned: 1987 Status: Active
Dianthus Commissioned: 1987 Status: Laid up 1993, sold to France 1997
Fuschia Commissioned: 1988 Status: Laid up 1993, sold to France 1997
Iris Commissioned: 1988 Status: Laid up 1993, sold to France 1997
Lobelia Commissioned: 1989 Status: Active
Myosotis Commissioned: 1989 Status: Converted to ammunition transport. Taken out of service in 2004 and sold to Bulgaria in 2009.
Narcis Commissioned: 1990 Status: Active
Primula Commissioned: 1991 Status: Active
System
Alternative Designation Tripartite Class
Type Minehunter
Builder Béliard Shipyard
Crew The complement of the Belgian ships varies between 33 and 46 depending on mission.
Mine Warfare System Mine countermeasures equipment originally included two PAP-104 Mark 4 remote-controlled submersibles, EVEC 20 plot table, autopilot, Toran and Sydelis radio navigation aids, as well as the Decca HiFix Mark 6 precision navigation system. The mine-detection range of the sonar is greater than 1,640 ft (500 m). An autopilot system is provided. Starting in 1999, the class was fitted with new Consilium Selesmar NN 950 navigational radars.
Divers When minehunting, the Belgian vessels carry six divers and can have a portable decompression chamber installed abaft the forecastle break.
Dimensions
Length 51.6 m
Beam 9.0 m
Draft 2.6 m
Displacement, Standard 510 tons
Displacement, Full Load 540 tons
Propulsion System
Engine Name 1 x Brons-Werkspoor A-RUB 215 x 12 diesel
Engine Type Diesel
Engine Power 1,900 total bhp; 1 shaft
Auxiliary Power 2 x 120-shp ACEC active rudders (for minesweeping)
Bow-Thrusters 2 x 75-shp bow-thrusters
Maximum Speed 15 kts (7 kts hunting)
Maximum Range 3,500 nm at 10 kts
Endurance 15 days
Gun Weapon Systems
Gun Weapon System #1
Name 20 mm modèle F2 gun
Type Naval Gun
Caliber 20 mm
Quantity 1 x 20 mm modèle F2 gun
Length INA
Weight 332 kg (732 lb) (without ammunition)
Action Gas unlocked, delayed blowback[1
Elevation −15° to + 65°
Rate of Fire 720 round/min
Muzzle Velocity 1,050 m/s
Effective Firing Range 1,500 m (4,900 ft) against aerial targets
Gun Weapon Systems #1 Ammunition
Type Rifle
Caliber 20 mm
Cartridge 20×139mm
Basic Load INA
Fire Control Systems
FCS Name INA
Computerized FCS No
Combat Data System They are equipped with an Atlas Elektronik IMCMS combat data system.
Radar Systems
Navigation Radar 1 x Decca TM 1229C navigation; or 1 x Consilium Selesmar NN 950 navigation radar
Sonar Systems
Hull Mounted Sonar 1 x Thales TSM-2022 Mk II hull-mounted HF Sonar
Minehunting Sonar 1 x Thales PVDS Minehunting Sonar
Protection
Active Protection System INA
Countermeasures INA
NBC Water Washdown System Yes
Details
Country of Origin Belgium
Category Naval
Naval
Filter Label
T
Classification
Domain
Naval & Littoral
Equipment Status
Active
Dimensions
Length
51.6 m
Width
Height
Weight
Operators (1)
Belgium
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