a miniature submarine used to explore the ocean in places so deep that the water pressure would crush a conventional submarine like an aluminum can
a one atmoshere submarine, meaning that the people in it are not in a pressurized atmosphere like the operators in a Saturation System
a pressurized metal sphere that allows people to descend deep into the ocean
a pressurized metal sphere that allows people to go deep in the ocean, to depths at which diving unaided is impossible
a spherical deep-sea diving submersible which is lowered into bodies of water with a cable
a type of submersible which lacks any self-propulsion
A metal ball or sphere lowered on a cable from a ship for deep sea diving.
A bathysphere is a spherical deep-sea submersible which is unpowered and is lowered into the ocean on a cable.