How fast should a diver ascend?

How fast should you ascend?

It is recommended to not exceed the rate of 60 feet (18 m) per minute when ascending from more than 60 feet of depth, and 30 feet (9 m) per minute for dives shallower than 60 feet. Ascending even slower will give you an added margin of safety. 5. Make safety stops.

How fast can you ascend in water?

The answer varies among scuba certification organizations. Some organizations list a maximum ascent rate of 30 feet/9 meters per minute, while others allow a faster ascent rate. For example, old PADI dive tables (based on the US Navy Dive Tables) allow a maximum ascent rate of 60 feet/18 meters per minute.

Why do divers ascend slowly?

Nitrogen in a diver’s body will expand most quickly during the final ascent, and allowing his body additional time to eliminate this nitrogen will further reduce the diver’s risk of decompression sickness. … Divers should slowly ascend from all dives to avoid decompression sickness and AGE.

What is the average speed of a diver?

Whereas most divers can achieve sustained speeds of about 1 knot and sprint at about 1.5 knots, the ocean conditions require speeds more along the lines of 3 knots sustained and 5 knots in a sprint.

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What happens if a diver ascends too quickly?

Decompression sickness: Often called “the bends,” decompression sickness happens when a scuba diver ascends too quickly. … But if a diver rises too quickly, the nitrogen forms bubbles in the body. This can cause tissue and nerve damage. In extreme cases, it can cause paralysis or death if the bubbles are in the brain.

How long does it take to dive 40 meters?

40 meters is about as deep as one can dive on air while still having somewhat of a bottom time (albeit less than 10 minutes, with a safety stop strongly recommended) before decompression stops are required.

How do you ascend slowly when diving?


When you are ready to ascend, hold your inflator hose in your left hand and have your finger on the deflate button. You should start to kick up slowly, while continuously releasing air from your BCD. This stops the air in your BCD from expanding too much and pulling you up too quickly!

How long can you dive at 40 feet?

12 metres (40 feet) dive depth: BSAC no decompression time limit 122 minutes (PADI Tables 140 minutes).

Do you inflate your BCD to ascend?

Only upon reaching the surface should you inflate your BCD. Any ascent, especially a blackwater ascent, is a diving skill, which means that it takes training and practice. … If you need to add a large amount of air to your BCD to stay on the surface, you are most likely overweighted by at least five pounds.

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Why do divers shower after every dive?

Why divers shower

“Divers shower in between dives typically just to keep themselves and their muscles warm,” he says. They usually rinse off in water that’s warmer than the pool. … air temperature on the pool deck may be a little chilly, so the shower can help keep muscles warm.