Last year, Mr. Rush described the business to CBS News as “very unusual,” providing “a new type of travel.”

The company first planned a voyage to the Titanic in 2018, according to the technology news site GeekWire, but the Titan sustained damage to its electronics from lightning. Then, in 2019, the voyage was postponed again because of a problem with complying with Canadian maritime law limitations on foreign flag vessels, according to GeekWire.

Before the first successful trip to the Titanic in 2021, the Titan was “rebuilt,” according to GeekWire, after tests showed signs of “cyclic fatigue” that reduced the hull’s depth rating to 3,000 meters.

In 2020, OceanGate announced that it was working with NASA’s Marshall Space Flight Center to assure that the submersible was strong enough to survive in the ocean’s depths.

According to the company’s website, OceanGate has successfully completed more than 14 expeditions and more than 200 dives in the Pacific, Atlantic and the Gulf of Mexico.