Titan sub: design flaws and company groupthink central to catastrophe, report finds | Titanic sub incident

Canadian security officials They published a damning report During the disastrous final voyage of the submarine Titan, he found that the US company behind the expedition had been defeated by “group think” and “confirmation bias” and failed to understand the profound risks facing its largely untested ships.

The 6.7-metre (22 ft) carbon fiber submarine dived beneath the surface of the Atlantic Ocean in June 2023 en route to the wreck of the ocean liner Titanic. However, communication was lost approximately two hours after he set off with five passengers. The disappearance sparked a frantic international search, with Canada and the United States marshaling all available resources.

OceanGate, the company behind the expedition, organized trips to the final resting place of the Titanic, which sank after hitting an iceberg in 1912, killing more than 1,500 of the 2,200 passengers and crew.

58-year-old Hamish Harding, British explorer and pilot on the submarine; British-Pakistani businessman Shahzada Dawood, 48, and her son Suleiman, 19; Paul-Henri Nargeolet, a deep diver, underwater pilot, former French navy commander and leading authority on the Titanic wreck; and Stockton Rush, founder of OceanGate.

Within days, investigators found the ship’s wreckage about 400 miles (640 km) off the coast of Newfoundland and concluded that all passengers died instantly when the structure exploded near the Titanic’s wreckage.

Inside The report was released on Wednesday.The Transportation and Safety Board of Canada (TSB) said multiple failures in the submersible design and the broader company culture were central factors in the disaster.

OceanGate has positioned itself as an ambitious undersea exploration company pioneering a carbon fiber submarine that can go deep below the surface.

Investigators said: “Immersing human-inhabited carbon fiber in the deep ocean was unprecedented, and the company acknowledged both internally and publicly that its operations involved risks.”

The Washington state-based company built a pair of 1/3 scale models to test how Titan responds to pressure. Six tests were conducted on these scale models. Both failed at depths above the Titanic’s resting place.

The company changed design and manufacturing to reduce the “ply waviness” of carbon fiber. Waviness can significantly weaken the strength of the material.

But unbeknownst to the company, Titan’s carbon fiber cylinder was accumulating damage each time it was exposed to extreme pressure during deep ocean dives.

“Normal engineering practice would be to subject full-scale models to a very significant number (hundreds, possibly thousands) of test cycles,” investigators wrote.

OceanGate did relatively little testing on the final ship. While performing tests equivalent to the Titanic There was no depth and no further analysis to understand if and when the hull might fail after deeper, repeated use. “Therefore, the number of cycles at extreme pressure that the full-scale pressure hull could withstand was unknown,” the report said.

The report stated that traditional diver design uses different materials and shapes to increase safety when working at great depths. He called Titan’s design “novel” and found that “the construction and testing of Titan did not comply with standard engineering practices.” Inspectors were able to examine parts of the material used to construct the hull and found structural defects that would have weakened the integrity of the ship.

Investigators also point to a number of examples where the craft could sustain sustained damage, including a collision with the Titanic’s port bow in 2022 and a violent explosion as the Titan surfaced from another dive days later. The vehicle was also left outside and exposed to the elements for approximately a year between 2022 and 2023.

“Whenever a structure is stressed, minor damage can accumulate,” the report said. “The higher the stress applied to the structure, the faster these damages will accumulate.”

While the vehicle successfully completed 13 dives, accumulated weaknesses in the materials meant that the 14th dive was fatal. Although not all of the wreckage was recovered, researchers estimate that the hull failure occurred 5,397 seconds after the underwater crew sent a text message to a depth of more than 3,000 meters.

According to the report, the acoustic monitoring system used to warn crews of an impending structure failure “was not consistently tested to demonstrate that it would provide adequate advance warning” and “did not operate as intended at the time of occurrence” when the disaster occurred.

Although the ship’s physical structure raised investigators’ concerns, they also found that the company culture exhibited “closed-mindedness, pressures for uniformity, and overestimation of the power of the group,” increasing the riskiness of the endeavor.

“Throughout OceanGate’s operating history… employees with expertise in specific areas have left the company or been terminated after expressing safety concerns or differing perspectives from the CEO,” the report said, adding that confirmation bias “impacted decision-making and risk management regarding the structural integrity and lifespan of OceanGate’s Titan pressure hull.”

In July 2023, Oceangate released: a one-line statement It said on its website that it had ceased “all search and commercial operations.”

Investigators found that the undersea world was largely unregulated and that there was “no external audit by regulators of OceanGate’s risk assessment processes” and no oversight by a classification society in any of the countries in which it operates.

Because information sharing between Transport Canada (TC) and other government departments was limited, TC generally did not have important information about Titan.

In one example, the department of fisheries and oceans participated in the OceanGate mission in 2021 and found that Titan was not approved or certified by any regulatory agency, was built from a material not commonly used for submarines carrying people, and OceanGate did not carry insurance.

TC said that unless a change in policy was made, “there is a risk that ships and crews will continue to operate without minimum defence, leading to unsafe conditions and potentially fatal accidents.”

TSB Chairman Yoan Marier said: “We have been calling for stronger regulatory oversight of the maritime industry for years. Lives are at risk when security vulnerabilities are not addressed.”