Tripartite-class minehunter

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French Tripartite minehunter Céphée
French Tripartite minehunter Céphée
Class overview
Name: Tripartite class
Built: 1981-1989
In service: 1981-
In commission: 1981
Completed: 45
Retired: 0
General characteristics
Type: Minehunter
  • 536 t (528 long tons) empty
  • 605 t (595 long tons) full load
Length: 51.5 m (169 ft)
Beam: 8.96 m (29.4 ft)
Height: 18.5 m (61 ft)
Draught: 3.6 m (12 ft)
  • 1 × 1370 kW "Werkspoor RUB 215" V12 diesel
  • 2 × 180 kW ACEC active rudders
  • 1 × HOLEC bow propellor
Speed: 15 knots (28 km/h)
Range: 3,000 nautical miles (5,600 km) at 12 knots (22 km/h)
Boats & landing
craft carried:
Complement: 4 officers, 15 non-commissioned officers, 17 sailors
Sensors and
processing systems:
  •  French Navy:
  • 1 × DUBM 21B sonar
  • 1 × Decca 1229 navigation radar
  •  Belgian Marine Component:
  • 1 × Thales Underwater Systems TSM 2022 Mk III Hull Mounted Sonar
  • 1 × SAAB Bofors Double Eagle Mk III Self Propelled Variable Depth Sonar
  • 1 × Consilium Selesmar Type T-250/10CM003 Radar
Armour: none
Aviation facilities: none

The Tripartite class is a class of mine warfare vessel used by the navies of Belgium, France and the Netherlands, as well as Pakistan, Indonesia, Latvia, and Bulgaria.


A joint venture of the navies of France, Belgium, and the Netherlands, the Tripartite class of minehunters were conceived in the 1970s and built in the 1980s. France built the mine-hunting equipment, Belgium provided the electronics, and the Netherlands constructed the propulsion train. France and the Netherlands originally bought 15, with Belgium buying 10.[1]

All three countries' Tripartite ships contribute at times to NATO's Standing Maritime MCM capability groups (SNMCMG1 or SNMCMG2).

Ships of the class[edit]

A total of 45 ships have been produced in the tripartite-class, below is a breakdown of how many ships each country has acquired.[2]


(Éridan class, Thales Group is currently upgrading France's Tripartite minehunters)

  • M641 Éridan
  • M642 Cassiopée
  • M643 Andromède
  • M644 Pégase
  • M645 Orion
  • M646 Croix du Sud
  • M647 Aigle
  • M648 Lyre
  • M649 Persée (decommissioned in August 2009)
  • M650 Sagittaire (1989): Sold to Pakistan in 1992, where she serves as Munsif. Another Éridan-class minehunter, built in 1993 and launched in 1995, is now commissioned in the French Navy as Sagittaire, also with hull number M650.[3]
  • M651 Verseau (former Belgian M920 Iris, decommissioned in February 2010)
  • M652 Céphée (former Belgian M919 Fuchsia)
  • M653 Capricorne (former Belgian M918 Dianthus)
  • M650 Sagittaire (1996) Replacement for the Sagittaire of 1989 sold to Pakistan.


Originally 10 ships were built for the Belgian navy. All remaining Belgian vessels have undergone an extensive upgrade during 2004-2008 involving replacement of the anti-mine warfare equipment. Also called "CMT" for Chasseur de Mines Tripartite, all are named after flowers and are thus sometimes called the "Flower" class in international literature.

Currently in service:

Formerly: M920 Iris, M919 Fuchsia and M918 Dianthus were sold to France and M922 Myosotis was sold to Bulgaria


  • Tsibar (former Belgian Navy Myosotis (M922)


("Pulau Rengat" class)

  • 711 Pulau Rengat (first intended to be Dutch M864 Willemstad)
  • 712 Pulau Rupat (first intended to be Dutch M863 Vlaardingen)


  • M-04 Imanta (former Dutch M854 Harlingen)
  • M-05 Viesturs (former Dutch M855 Scheveningen)
  • M-06 Talivaldis (former Dutch M852 Dordrecht)
  • M-07 Visvaldis (former Dutch M851 Delfzijl)
  • M-08 Rusins (former Dutch M850 Alkmaar)


("Alkmaar" class)

  • M850 Alkmaar (no longer in service, sold to Latvia)
  • M851 Delfzijl (no longer in service, sold to Latvia)
  • M852 Dordrecht (no longer in service, sold to Latvia)
  • M853 Haarlem (out of commission sept 2011)
  • M854 Harlingen (no longer in service, sold to Latvia)
  • M855 Scheveningen (no longer in service, sold to Latvia)
  • M856 Maasluis (out of commission sept 2011)
  • M857 Makkum
  • M858 Middelburg (out of commission sept 2011)
  • M859 Hellevoetsluis (out of commission sept 2011)
  • M860 Schiedam
  • M861 Urk
  • M862 Zierikzee
  • M863 Vlaardingen
  • M864 Willemstad


("Munsif" class)

  • M166 Munsif (former French M650 Sagittaire)[4]
  • M163 Muhafiz (built in France)[5]
  • M164 Mujahid (assembled in Pakistan in 1998)[5]


The Netherlands and Belgium[edit]

The Netherlands and Belgium are doing a joint procurement for the replacements of the Tripartite-class/Alkmaar-class minehunters. Both countries want to procure six new mine countermeasure (MCM) vessels, which makes for a total of 12 MCM ships. The New MCM ships will include a range of unmanned systems including unmanned surface, aerial and underwater vehicles alongside towed sonars and mine identification and neutralization ROVs.[6]

Belgium gave the green-light to start the procurement on 26 January 2018 and approved a budget of 1.1 billion euros for the 6 Belgian MCM ships. The ships will replace besides the tripartite-class minehunters, also the Belgian logistical support ship BNS Godetia.[7]


  • The Franco-Belgium consortium made up of French shipbuilders STX France and Socarenam togheter with Belgium’s EDR are bidding for the 12 new MCM vessels.[8] Their plan includes the construction of MCM vessels named Sea Naval Sollution and a multi-role frigate named Deviceseas, which will serve as mothership to the MCM vessels. All ships will have a strong focus on autonomous systems operations.[9]

See also[edit]


  1. ^ Tripartite (or Alkmaar) class minehunters, Global Security, retrieved 31 January 2018 
  2. ^ Tripartite Minehunter - Archived 11/2001, Forecast International, retrieved 31 January 2018 
  3. ^ Sagittaire (M 650)
  4. ^ [1] Archived July 4, 2006, at the Wayback Machine.
  5. ^ a b USA, IBP (2009-03-20). Pakistan Intelligence, Security Activities and Operations Handbook. ISBN 9781438737218. 
  6. ^ Belgium OKs acquisition of six new mine countermeasure vessels,, 29 January 2018, retrieved 31 January 2018 
  7. ^ Groen licht voor aanschaf zes nieuwe mijnenjagers voor België,, 27 January 2018, retrieved 31 January 2018 
  8. ^ STX France, EDR, Socarenam team for Belgian mine countermeasure project,, 31 January 2018, retrieved 31 January 2018 
  9. ^ Ibidem.

External links[edit]