Vescovo's expedition is designed to take him to the deepest points of all five oceans.

Five Deeps Expedition Map
Five Deeps Expedition

Vescovo described the bottom of the ocean as "an incredibly hostile environment." But in general, being underwater in a submarine is "relatively peaceful," he said.

If he's successful, Vescovo will eventually become the first person to have climbed to the highest point of each continent and reached the deepest point of each ocean.

Five deeps expedition
Atlantic Productions

About a decade ago, billionaire Richard Branson tried to embark on a similar diving feat, but the project was suspended after it failed to build a submarine that could sustain multiple dives. 

Vescovo's journey began in December 2018 with the Puerto Rico Trench dive, and is expected conclude in September 2019 in the Arctic Ocean.

five deeps expedition
Reeve Jolliffe EYOS Expeditions

"These aren't going to be one-off dives that are experimental in nature," Vescovo told Business Insider. "We are trying to construct a system that opens the door to the ocean."

With his first dive, Vescovo became the first person to reach the deepest part of the Atlantic Ocean.

Victor expedition 2
Reeve Jolliffe EYOS Expeditions

His dive in Puerto Rico took him 27,480 feet below the water's surface.

"It felt great to get to the true bottom of the Atlantic Ocean for the first time in history," he said in a release after he returned to the surface.

His second dive took place in February in the South Sandwich Trench, an area between South America and Antarctica.

Victor expedition
Caladan Oceanic

This time, he traveled 24,400 feet below sea level.

On his third dive in the Indian Ocean, Vescovo discovered a mysterious species that had never been seen by humans before.

Five Deeps new species
Five Deeps Expedition

The animal resembles a bottom-dwelling jellyfish, but Vescovo said him team isn't quite sure about its species.

The team has discovered three or four new species on every deep dive they've done, but Vescovo noted that this particular animal was "very, very unique looking" compared to the others.

Vescovo's $48 million Triton 36000 deep-sea submarine took three-and-a-half years to design and build. He's confident that it will continue to keep him safe underwater.

Five Deeps Expedition
Reeve Jolliffe EYOS Expeditions

"We kind of have a running joke within the development team that I don't trust a lot of things, but I do trust math. I do trust titanium," he said. "We have very high confidence that the systems will survive these extreme environments."

Vescovo said that at the ocean's most extreme depths, pressure levels are 1,100 times stronger than at the water's surface.

Five Deeps Expedition
Caladan Oceanic

So his team tested the submarine at pressures beyond that of the deepest parts of the ocean floor.

In two weeks, Vescovo will attempt to reach the Challenger Deep — the deepest known point in the ocean.

Five deeps expedition.JPG
Five Deeps Expedition

Challenger Deep is located at the bottom of the Mariana Trench in the Pacific Ocean, almost 7 miles underwater. It's farther down from sea level than Mount Everest is up.

"We believe, hopefully, given our track record, that we'll be successful," he said.

Fewer people have reached Challenger Deep than have walked on the moon.

James Cameron
The Deepsea Challenger submersible carried James Cameron into the Mariana Trench.

Hundreds of people have ventured into space, and a dozen have landed on the moon. But only three have reached Challenger Deep.

Film director James Cameron went there in 2012, and explorers Jacques Piccard and Don Walsh did it more than 50 years earlier in 1960. But that's it.

Vescovo plans to go down multiple times. 

Vescovo said diving is the opposite of mountain climbing, but both require "calculated risks."

Victor expedition
Caladan Oceanic

"In mountain climbing ... you are completely subjected to the weather and you feel freer because you're surrounded by a lot of open space. You feel the biting cold and you feel the wind," he said.

But deep-sea diving, by contrast, is a "far more technical mission."

While speaking at TED, Vescovo said the experience was "kind of like the Space X of ocean exploration, but I pilot my own vehicles."

"Elon [Musk], if you're listening," he said, "I'll give you a ride in mine if you give me a ride in yours."

Read more from TED 2019:

MIT researchers discovered a way to move objects as heavy as a great white shark with your bare hands. Take a look.

The woman who blew open the Cambridge Analytica scandal says Mark Zuckerberg and Jack Dorsey are 'handmaidens to authoritarianism'

Octopus skin could be artificially replicated to make camouflage clothing and color-changing makeup