Left: The Dry Tortugas underway on January 26, 2024; Right: The Dry Tortugas after the contact.

​ Left to right: The Dry Tortugas underway in January 2024, and platform VK-817A at 

an unknown date after the casualty. (Sources: Scott Rambo, marinetraffic.com, and Third 

Coast) 

Contact of Offshore Supply Vessel Dry Tortugas with Offshore Platform VK-817A

What Happened

​​On August 16, 2025, about 0530 local time, the offshore supply vessel Dry Tortugas was approaching the offshore gas and condensate production platform Viosca Knoll Block 817A (VK-817A) in the Gulf of America, about 50 miles east of Venice, Louisiana, when the vessel contacted the platform. One crewmember of the Dry Tortugas sustained a minor injury; no crewmembers aboard platform VK-817A were injured. No pollution was reported. Total damage to the vessel and platform was $5 million.

What We Found

​​We determined that the probable cause of the contact of the offshore supply vessel Dry Tortugas with the offshore gas and condensate production platform VK-817A was the on-watch captain falling asleep at the helm due to fatigue from work completed outside his scheduled 12 hour watch.

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