The Cameroon-flagged MV Marquise, struck by a drone attack off the coast of Ukraine, safely transited the Istanbul Strait under heavy security escort on the morning of May 16, 2026. The vessel entered the Bosphorus at approximately 08:30 local time, accompanied throughout the passage by Turkish Coast Guard tugboats and rescue craft. Two-way vessel traffic through the strait was temporarily suspended for security reasons.
Following the attack in the Black Sea, the damaged Marquise completed a controlled transit lasting several hours before clearing the strait without incident. Upon completion of the operation, Istanbul Strait vessel traffic resumed normal two-way operations. Turkish authorities have not yet issued detailed statements regarding the extent of damage sustained by the vessel in the attack.
The incident has once again highlighted security risks facing commercial vessels in the Black Sea. While commercial maritime traffic continues in the region, security protocols remain critical for freight forwarders and shipowners. Türkiye's management of damaged vessels transiting its straits underscores its responsibilities under the Montreux Convention governing the Turkish Straits.
Details regarding Marquise's cargo and final destination port have not been disclosed. However, the event is seen as a tangible reflection of ongoing tensions affecting the Black Sea supply chain. Maritime operators in the region continue to face rising insurance costs and heightened operational risk management challenges.
The swift response and coordinated transit operation by Turkish authorities demonstrated the strategic importance and traffic management capacity of the Istanbul Strait. Approximately 42,000 vessel transits occur annually through the Bosphorus, each monitored with precision.
Key Takeaways:
1. Cameroon-flagged MV Marquise was struck by a drone attack off the coast of Ukraine.
2. The vessel entered Istanbul Strait at 08:30 on May 16 and transited under security escort.
3. Turkish Coast Guard tugboats and rescue vessels accompanied the ship throughout the passage.
4. Two-way Istanbul Strait traffic was temporarily suspended for security reasons.
5. The incident renewed focus on security risks facing commercial vessels in the Black Sea.
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