Dubai explorer talks of dangers he faced while making the deepest dive in history

Hamish Harding descended to a depth of almost 13 Burj Khalifas in a small submersible vessel

Hamish Harding and his son, Giles, are back in Dubai. Mr Harding broke two world records last week on his mission to explore the depths of the Challenger Deep in the Mariana Trench, in the South Pacific Ocean. Chris Whiteoak / The National

Hamish Harding with the new shrimp-like species he discovered at the bottom of the ocean. Chris Whiteoak / The National

Explorer Hamish Harding shows what deep atmospheric pressure can do a polystyrene cup. Chris Whiteoak / The Nationa

The vessel, called The Limiting Factor, was used by Hamish Harding on his journey to the bottom of the ocean. Courtesy: Nick Verola

Hamish Harding and his son, Giles, standing in front of expedition yacht DSSV Pressure Drop. Courtesy: Nick Verola

Hamish Harding and his son, Giles, on their expedition to the South Pole in 2020. Courtesy: Action Aviatio

A Dubai resident talked of the danger he faced during his historic journey to the bottom of the ocean.

Hamish Harding, 49, broke two world records last week on his mission to explore the depths of the Challenger Deep in the Mariana Trench in the South Pacific Ocean, which at nearly 11 kilometres is regarded as the deepest point beneath the waves.

His 12-hour mission set two Guinness World Records – the greatest distance travelled at full ocean depth and the greatest time spent at full ocean depth.

We were making a record attempt and had to go to areas that no other human being had been to before

While the expedition was a success, it did not unfold without unexpected drama that could have been taken straight from a Jules Verne novel.

“Because we were making a record attempt, we had to go to areas that no other human being had been to before,” Mr Harding said.

“We encountered jagged vertical rock faces that were very challenging to get over and we had to ascend very quickly as we didn’t want to get snagged on the rocks.

"We had to use our thrusters the entire time to climb the rock face which was about the size of Burj Khalifa. We were not expecting that at all as we expected a much flatter surface."

Mr Harding, who runs a business jet brokerage firm, was part of a two-man crew that descended to a depth that was the equivalent of about 13 Burj Khalifas.

They achieved the feat in a small submersible vessel called the Limiting Factor.

He was accompanied on the mission by Victor Vescovo, an American explorer and private investor who helped develop the vessel.

Hamish Harding and his son, Giles, on their expedition to the South Pole in 2020. Courtesy: Action Aviation

Another challenge they encountered was avoiding the debris left by previous failed expeditions.

“We had to be careful not to get snagged on the cables from other countries’ attempts to send remote-operated vehicles down there,” Mr Harding said.

“The cables were abandoned there after they had snapped.”

Scientists claimed the Mariana Trench was so deep that human bones would dissolve because of the intense pressure.

The conditions created further hurdles for Mr Harding to overcome.

“Getting electronics to work down there was a challenge,” he said.

“A cable can work perfectly a million times when tested on the surface but it’s a different story when it is subjected to such intense atmospheric pressure.

“Cables often move together when such pressure is exerted and it creates electrical shorts, which could cause something to suddenly stop.”

Hamish Harding used the 'Limiting Factor' vessel on his journey to the bottom of the ocean. Courtesy: Nick Verola

Mr Harding said he also discovered a new species in an environment where the atmospheric pressure was 1,200 times higher than what humans experienced on the surface.

He hopes his discovery will be of benefit to the wider scientific community.

“We found a shrimp-like creature that appears to be completely hollow,” he said.

“The reason for this is these creatures have water flowing through them at great pressure. A human head, for example, would be crushed.”

He said the creatures were being analysed by Newcastle University.

Water samples from the mission are also being scrutinised by the same scientists to see whether microplastics are present.

Mr Harding said he was already resigned to those studies finding evidence of pollution.

“The world needs to do something about pollution,” he said.

“Letting plastics get into the ocean is never going to end well.

“Microplastics are already getting into our food chain and that’s not good.”

Mr Harding said his mission was inspired by the UAE, where the UK citizen has lived since 1993.

“With the recent success of its Hope probe, the UAE has proved the impossible is possible and, as a long-term resident, I hope this achievement will in some small part contribute to the country’s reputation in science and exploration,” he said.

Mr Harding’s 13-year-old son Giles was also part of the team.

He updated people on the mission's progress with social media posts from the expedition's base of operations – a research ship previously used by the US Navy to hunt submarines.

Giles, a Dubai College pupil, had to keep to a strict schedule to balance his studies with life on board the vessel.

"I was learning remotely from 1.30pm to about 9.50pm each day," he said.

“I would go straight to bed then as you had to be up at 6am or you would miss breakfast.

“I would definitely like to go on more missions like this if it’s possible.”

Five deep ocean expeditions - in pictures

Team reviewing dive sites in the Atlantic Ocean. Courtesy: The Five Deeps Expedition

LF emerging from dive at Atlantic Ocean. Courtesy: The 5 Deeps

Lander getting ready to launch at the Atlantic Ocean dive site. Courtesy: The Five Deeps Expedition

Team entering Limiting Factor for the Atlantic Ocean dive. Courtesy: The Five Deeps Expedition

The DSSV Pressure Drop. Courtesy: The Five Deeps Expedition

Victor Vescovo indicates to the Expedition Team the proposed routing for the South Sandwich. Courtesy: The Five Deeps Expedition

Victor Vescovo discusses plans for the Southern Ocean dive. Courtesy: The Five Deeps Expedition

Deployment of science lander "Flere" at the Southern Ocean dive site. Courtesy: The Five Deeps Expedition

Victor Vescovo on board the DSSV Pressure Drop

The team works in the Southern Ocean. Courtesy: The Five Deeps Expedition

A boat sails past an Iceberg in the Southern Ocean. Courtesy: The Five Deeps Expedition

DSSV Pressure Drop sails the Southern Ocean. Courtesy: The Five Deeps Expedition

Vescovo's craft is lowered into the sea. Courtesy: The Five Deeps Expedition

The team discovered a new species of jellyfish in the Indian Ocean. Courtesy: The Five Deeps Expedition

The team discovered a new species of jellyfish in the Indian Ocean. Courtesy: The Five Deeps Expedition

The two crafts float on the Indian Ocean. Courtesy: The Five Deeps Expedition

A night dive on the Pacific Ocean. Courtesy: The Five Deeps Expedition

A dive on the Pacific Ocean. Courtesy: The Five Deeps Expedition

Limiting factor is lifted by DSSV's equipment. Courtesy: The Five Deeps Expedition

Victor Vescovo inside Limiting Factor. Courtesy: The Five Deeps Expedition