British billionaire Hamish Harding is among those feared to have gone missing since a tourist submersible went missing in the Atlantic Ocean after launching to take five people to visit the Titanic wreckage site underwater on Monday.

A frantic marine search has been launched to find the lost sub which was operated by tour company OceanGate Expeditions. Coastguards from both Boston and Canada have joined in the search. At 1 p.m. Monday, the sub had just 72 hours of oxygen left, according to the US Coast Guard Admiral, who is leading the search and rescue mission.

Who is Hamish Harding?

Hamish Harding posted excitedly on social media about the expedition commencing after a bout of bad weather in Newfoundland before the submarine went missing.

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Harding is a UAE-based British businessman, aviator, explorer, and space tourist. He is the founder of Action Group and chairman of Action Aviation, an international aircraft brokerage company with headquarters in Dubai, United Arab Emirates.

He was born on June 19, 2023, and is 58 years old. He has degrees in Natural Sciences and Chemical Engineering from Cambridge University. He also holds an Airline Transport Pilots License and business jet type ratings, including the Gulfstream G650, and is a skydiver.

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In 2017, Harding worked with the Antarctic VIP tourism company, White Desert, to introduce the first regular business jet service to the Antarctic using a Gulfstream G550. It landed on Wolfsfang Runway, a newly-created ice runway in Antarctica. Harding also accompanied Buzz Aldrin in 2016 as he became the oldest person ever to reach the South Pole.

On March 5, 2021, Hamish Harding and Victor Vescovo made history by diving to the deepest point of the Mariana Trench, which is called the Challenger Deep. They took a two-man submarine to the lowest point in the world’s oceans to a depth of 36,000 ft, setting the World Record for the greatest length covered at full ocean depth, and greatest time spent at full ocean depth.

On June 4, 2022, Harding was one of six astronauts to go to space on Blue Origin’s 5th human spaceflight aboard the New Shepard rocket.