It seems like you know the answer, but it is 34 minutes (from 18 meters).
34 minutes would be the maximum allowed bottom time.
34 minutes
x minutes
250 meters
The current world record is 313 meters.
When a diver surfaces too quickly he gets 'the bends'.As the diver goes down, the pressure causes nitrogen to dissolve in the blood. That's harmless.On the way up the diver must allow time for the nitrogen to come out of the blood slowly. If the diver comes up faster than the recommended timing, the nitrogen gas will form bubbles and block small blood vessels, causing 'the bends' a painful and life threatening condition that is cured by putting the patient in a pressure chamber and bringing the pressure down very, very slowly.
Diver down flag was created in 1956.
Diver Down was created on 1982-04-14.
During the deep dive the divers body goes through immense pressure. The atmospheric pressure in the deep as one goes more deep it increases so the lungs of the diver has to do more work and also that if the diver comes up on surface faster ten the rate he went down then the helim would be formed in the lungs of diver which can be lethal.
That is a Scuba diver flag, meaning "diver down."
Lower. There is less air pressure pushing down on you, than say, a deep sea diver
There are two types of diver down flags - the diver down flag and the alpha flag. The red diver down flag is used when divers are in the water to alert boats to the possibility of divers near the surface, and the blue alpha flag is flown by a boat whenever the mobility of the vessel is restricted.
There are two types of diver down flags - the diver down flag and the alpha flag. The red diver down flag is used when divers are in the water to alert boats to the possibility of divers near the surface, and the blue alpha flag is flown by a boat whenever the mobility of the vessel is restricted.
That is a Scuba diver flag, meaning "diver down."
Water pressure push against your eardrums, with nothing pushing back. The stretching hurts. You need to learn a diver's trick called pressure equalizing.