First class divers could work 300 ft (91 m) depths while salvage and second class divers were qualified down to 150 ft (46 m).
Why do divers dive backwards?
Just like using a diver down flag, diving back into the water is a standard safety technique. … Backward diving allows scuba divers to keep a hand on their gear while entering the water to avoid losing a mask or getting lines tangled.
What happens if u fart in a wet suit?
As we ascend, the wetsuit neoprene or drysuit gas expands, as does the BCD air, so we gain buoyancy. … Similarly, when you fart while scuba diving in a wetsuit, gas is lost from your body, so you will technically become less buoyant. The impact is, however, minimal due to the fart’s small volume.