First class divers could work 300 ft (91 m) depths while salvage and second class divers were qualified down to 150 ft (46 m).
How deep can you dive without having to decompress?
There’s a bit of physics and physiology involved in a full explanation, but the short answer is: 40 metres/130 feet is the deepest you can dive without having to perform decompression stops on your way back to the surface.
What is the Challenger Trench?
The Challenger Deep is the deepest known place on Earth, with a depth of between 35,755 and 35,853 feet (10,898 to 10,928 meters). It is located at the southern end of the Mariana Trench, in the Pacific Ocean, near the Mariana Islands. The Challenger Deep occupies a vast underwater area.
Can your body explode underwater?
The pressure from the water would push in on the person’s body, causing any space that’s filled with air to collapse. (The air would be compressed.) So, the lungs would collapse. … But if there’s no air-filled space to be pushed into, the body would not be crushed.