Final Oceangate Report Release – Engineering and Insufficient Regulations at Fault
On October 15, 2025, the National Transportation Safety Board (NTSB) released its final, 87-page report with regards to the infamous June 18, 2023, Oceangate submersible implosion. The report comes on the heels of the US Coast Guard’s (USCG) final 335-page report released in early August of this year. The primary goal with both of these reports is to summarize the findings of the two governing bodies with regards to the deep-sea submersible tragedy.
The report states that Titan, the name of the submarine, was diving to the wreck of Titanic in the North Atlantic Ocean about 370 nautical miles southeast of St. Johns, Newfoundland. There were five fatalities and the vessel is deemed a total loss with a value of $4.2 million USD. You can read the report for yourself, but this bit of the NTSB Abstract summarizes their analysis succinctly:
“Safety issues identified in this report include OceanGate’s inadequate engineering process for the Titan; OceanGate’s flawed analysis of Titan strain gage [gauge] and acoustic emission (real-time monitoring system) data as a measure of pressure hull integrity; OceanGate’s failure to notify search and rescue assets about its planned expedition; and insufficient voluntary guidance and US regulations for pressure vessels for human occupancy.”
The whole report makes for an interesting read and confirms much of the USCG report and the popular Titan: The Oceangate Disaster Netflix documentary. There seems to be no new revelations in the NTSB report, but rather definitive conclusions about the series of events that lead to the submarine implosion.
The Conclusions are listed in the NTSB report (page 65) and retell the fateful day in a blow-by-blow fashion:
- The Titan pressure vessel likely sustained damage after it surfaced at the end of dive 80 in the form of one or more delaminations that formed from voids between the cylinder’s five co-bonded layers, leading to the deterioration and weakening of the pressure vessel.
- After dive 82, the Titan sustained additional damage—of unknown origin—that further deteriorated and weakened the pressure vessel to a point where it could not survive a dive to the depth of the Titanic.
- The existing delaminations and additional damage that deteriorated the condition of the pressure vessel between dive 82 and the casualty dive likely resulted in a local buckling failure that led to the implosion of the Titan.
- OceanGate’s engineering process for the Titan was inadequate and resulted in the construction of a carbon fiber composite pressure vessel that contained multiple anomalies and failed to meet necessary strength and durability requirements.
- Because OceanGate did not perform adequate testing, including cycle life evaluation, of the Titan pressure vessel, the company was unaware of its actual strength and durability, which was likely much lower than their target, as well as the implications of how certain operational changes, including storage condition and towing, could impact the integrity of the pressure vessel and overall safety of the vessel.
- Because OceanGate’s analysis of Titan pressure vessel strain gage and acoustic emission (real-time monitoring system) data was flawed, the company was unable to identify that the pressure vessel was damaged after dive 80 and that it needed to be immediately removed from service.
- Had OceanGate followed Navigation and Vessel Inspection Circular 05-93 guidance for emergency response plans, they likely would have had emergency response assets standing by and the Titan likely would have been found sooner, saving time and resources even though a rescue was not possible in this case.
- Despite OceanGate’s failure to notify search and rescue assets about its planned expedition, and the limited resources able to operate at the depth of the Titanic wreckage, the US Coast Guard’s response coordination efforts were effective and resulted in the timely discovery of the Titan wreckage.
- Voluntary guidance and current US small passenger vessel regulations are not sufficiently tailored to current pressure vessel for human occupancy operations to ensure the safety of pressure vessels for human occupancy in accordance with established technical and classification society standards.
- International standards for pressure vessels for human occupancy would ensure consistency in design, construction, and operation requirements for pressure vessels for human occupancy that operate around the world.”
The final Probable Cause is stated on Page 66:
“The National Transportation Safety Board determines that the probable cause of the hull failure and implosion of the submersible Titan was OceanGate’s inadequate engineering process, which failed to establish the actual strength and durability of the Titan pressure vessel and resulted in the company operating a carbon fiber composite vessel that sustained delamination damage that was subsequently exacerbated by additional damage of unknown origin, resulting in a damaged internal structure that subsequently led to a local buckling failure of the pressure vessel. Contributing were US and international voluntary guidance and US small passenger vessel regulations that were insufficient to ensure OceanGate adhered to established industry standards. Also contributing was OceanGate’s flawed analysis of their pressure vessel monitoring system data, which led to their continued operation of a damaged pressure vessel.”
The NTSB also submits four recommendations that ask for greater oversight of pressure vessel for human occupancy (PVHO) operations. The fourth recommendation proposes to the International Maritime Organization to promote consistency application of PVHO rules among member states. One can’t help but think that this may be motivated by Oceangate’s many successful attempts to dodge US regulations by playing with international loopholes in Bahamian and Canadian waters.
Overall, the NTSB report to my read is what closure looks like. The USCG, documentarians, and countless others have spent the last two years vigorously investigating the Oceangate disaster. Now the NTSB has weighed the facts, deliberated, and entered into the record its account that will likely stand as the historical narrative. At the end of the day, the takeaway is not very complex—subverting maritime safety rules and defying engineering realities have disastrous consequences when it comes to deep sea exploration. This underwater tragedy that unfortunately included the loss of five lives, one a teenager, could have, and should have, been prevented.
NTSB final report on Oceangate
