like 11,000 meters
hello how are you today?
with a submarine or a machine called "Alvin"
A submarine and probably an unmanned one at that due to pressure concerns.
as far as i can remember your not supposed to go to the submarine.
A nuclear submarine is only limited by food it can travel as long as there foods
there is too much water pressure so it will be crushed under all the weight.
"Regular" subs don't. The deeper you go, the greater the pressure. Eventually they'll crumble.
It is called a bathysphere. Horse Isle answer: bathysphere
As regards military submarines meant as warships, the Russians built the submarines with the deepest diving capability, but U.S. submarines generally make less noise.
3.8
The deepest spot in the ocean is the Marianna Trench with a depth of 35,760 ft (about 7 miles) it was last visited by Jacques Piccard and Lt. Don Walsh in the submarine "Trieste" in January of 1960.