<Tr> <Th> Known for </Th> <Td> Bathyscaphe </Td> </Tr> <Tr> <Th> Awards </Th> <Td> Hubbard Medal (2012) </Td> </Tr> <P> Jacques Piccard (28 July 1922--1 November 2008) was a Swiss oceanographer and engineer, known for having developed underwater vehicles for studying ocean currents . In the Challenger Deep, he and Lt. Don Walsh of the United States Navy were the first people to explore the deepest part of the world's ocean, and the deepest location on the surface of Earth's crust, the Mariana Trench, located in the western North Pacific Ocean . </P> <P> Jacques Piccard was born in Brussels, Belgium, to Auguste Piccard, who was himself an adventurer and engineer . Jacques' father Auguste twice beat the record for reaching the highest altitude in a balloon, during 1931--1932 . The Piccard family thus had the unique distinction of breaking world records for both the highest flight and the deepest dive . </P>

Who was the first man to reach the deepest part of the ocean