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18h ago

TSB Finds Defective Carbon‑Fiber Hull and Oversight Failures Caused Titan Implosion

TSB laboratory testing found the hull lost compressive strength, issuing six recommendations with a 90‑day deadline for Transport Canada to respond

Image
Debris from the Titan submersible, recovered from the ocean floor near the wreck of the Titanic, is unloaded from the ship Horizon Arctic at the Canadian Coast Guard pier in St. John’s on Wednesday, June 28, 2023. THE CANADIAN PRESS/Paul Daly
A large piece of the Titan submersible that was picked up off the ocean floor is unloaded from the Horizon Arctic in St. John’s. -Keith Gosse/The Telegram

Overview

  • The Transportation Safety Board concluded the Titan imploded during its June 18, 2023 descent because a carbon‑fiber pressure cylinder with reduced compressive strength failed progressively until catastrophic collapse.
  • Laboratory tests found manufacturing and damage-related defects in the cylinder and that the vessel’s as‑built material properties were never validated against the design assumptions.
  • The TSB said OceanGate did not follow standard engineering test cycles for human‑occupied pressure vessels and that company practices suppressed dissent and hindered risk management.
  • Investigators documented fragmented Canadian agency knowledge about Titan’s operations and no single authority provided effective oversight, leaving the uncertified, unclassed submersible able to operate from St. John’s without full regulatory review.
  • The 136‑page report issued six recommendations to strengthen technical standards and regulatory accountability, and Transport Canada must reply within 90 days, a move that could prompt new international rules for human‑occupied submersibles and change how deep‑sea tourism is regulated.