Victor Vescovo descended almost 11km to the deepest place in the ocean - the Pacific Ocean's Mariana Trench.
On April 28, in the middle of the Pacific Ocean, Victor Vescovo climbed into the cramped cockpit of his personal $48 million submersible and descended beneath the waves deeper than any human being had been.
Over 50 years later, Canadian explorer and filmmaker (writer and director of movies such as "Avatar" and the "Titanic") James Cameron took the first solo dive and reached a depth of 35,787 feet (10,908 m)".
However, Stephanie Fitzeherbert, a spokeswoman for Vescovo's team says that can't be confirmed.
Previous analysis of tiny deep-sea animals in the Mariana Trench found the ocean depths contain high levels of pollution.
Victor Vescovo piloting his submersible sub, the Limiting Factor.
The final challenge will be to reach the bottom of the Molloy Deep in the Arctic Ocean, which is now scheduled for August 2019.
But what was supposed to be an exciting scientific exploration was spoiled by some uninvited guests, including a plastic bag and candy wrappers.
Deep Sea Diving is one of the most outdoor adventurous actiivites that many people resort to while holidaying. The dive is part of an initiative to explore the deepest points in each of the world's five oceans. The team plans on having the sea creatures they collected tested for microplastics.
The Five Deeps Expedition is being filmed for a five-part Discovery Channel documentary series due to air in late 2019.
Technology has changed quite a bit since the Challenger Deep was first explored in 1960 by oceanographers Don Walsh and Jacques Piccard in the submersible Triest.
On one occasion, he spent four hours on the trench floor, viewing sea life ranging from shrimp-like anthropods with long legs and antennae, to translucent sea pigs, which are similar to sea cucumbers.