Saipem 7000, a Bahamas-flagged vessel described as the world’s third-largest semi-submersible heavy-lift vessel, entered the Istanbul Strait from the Black Sea and completed its passage.
Maritime traffic in both directions of the strait was temporarily halted on Thursday during the transit to ensure safe navigation. The operation was conducted in coordination with the Directorate General of Coastal Safety.
The vessel’s height was reduced to 57 meters
To enable Saipem 7000 to pass safely beneath the bridges in the strait, its seawater tanks were filled and its towers and lifting cranes were lowered. As a result, the vessel’s height was reduced from 135 meters to 57 meters.
The 198-meter-long vessel proceeded under extensive security measures throughout the passage. Tugs affiliated with the Directorate General of Coastal Safety escorted Saipem 7000, and pilotage services were provided.
Strait traffic resumes
After the passage was completed, the Istanbul Strait was reopened to two-way vessel traffic.
Deepwater pipeline work in the Black Sea
Saipem 7000 previously took part in the Blue Stream Project, which carries natural gas from Russia to Türkiye. The vessel laid a pipeline on the seabed at a depth of 2,150 meters in the Black Sea.
The vessel can lay natural gas pipelines in waters deeper than 2,000 meters and accommodate up to 725 crew members at the same time. Saipem 7000 continues to work on international marine infrastructure projects.