Seven Cold War Minehunters Head to Bulgaria—Will Turkey Let Them Pass?
Belgium and the Netherlands transfer seven Tripartite-class minehunters to Bulgaria amid Black Sea mine threats.
Belgium and the Netherlands have agreed to transfer seven decommissioned Tripartite-class minehunting vessels to Bulgaria, strengthening NATO’s mine countermeasure capabilities in the Black Sea. The deal, formalized in July 2024, includes four ships from Belgium and three from the Netherlands. Bulgaria’s parliament approved the acquisition of the Dutch vessels on August 27, while Belgium had already committed to providing its remaining hulls in 2025.
The 500-ton vessels, constructed between 1977 and 1995, were originally designed for Cold War operations by Belgium, the Netherlands, and France. Despite their age, they retain advanced capabilities, including sonar systems, remotely operated vehicles (ROVs), minesweeping equipment, and low-noise propulsion—critical tools for detecting and neutralizing drifting sea mines. Bulgaria will finance the repairs and upgrades needed to return the ships to active service.
Modernizing Bulgaria’s Fleet
This acquisition expands Bulgaria’s existing fleet of Tripartite-class vessels, which already includes three units purchased from Belgium in 2007 and the Netherlands in 2019. The additional ships will support the Black Sea Mine Countermeasures Task Group, a joint effort with Romania and Turkey to clear mines from the region.
The transfer may face delays due to Turkey’s enforcement of the 1936 Montreux Convention, which allows Ankara to restrict warship movements through the Bosporus during wartime. Turkey has previously blocked minehunting vessels donated to Ukraine, and no exceptions have been granted for Bulgaria’s new acquisitions. Until Turkey provides clearance, the ships’ delivery timeline remains uncertain.
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