On 18 June 2023, Titan, a submersible operated by OceanGate, an American tourism company, imploded during its descent in the North Atlantic Ocean, about 370 nautical miles (690 km) off the coast of Newfoundland, Canada. The submersible, carrying five people, was part of a disaster tourism expedition to sightsee the wreck of the Titanic. Communication with Titan was lost 1 hour and 45 minutes into its dive. Authorities were alerted when it failed to resurface at the scheduled time later that day.

https://en.wikipedia.org/wiki/2023_Titan_submersible_incident