What is the minimum surface interval required between a dive to 18 Metres 60 feet for 40 minutes?

What is the minimum surface interval required between a dive to 20 meters for 29 minutes?

According to PADI the MINIMUM surface interval is 4 minutes.

What is the minimum surface interval required between a dive to 70 feet for 29 minutes followed by a dive to 50 feet for 39 minutes?

According to PADI … the MINIMUM surface interval is 4 minutes. You’d exit the water after the first dive as an “N” diver. You’d need to be no more than an “M” diver to re-enter the water for your next dive to 50 feet for 29 minutes. According to NAUI … the MINIMUM surface interval is 46 minutes.

Which of the following limits should be established prior to every scuba dive?

If you are diving wearing an exposure suit, you should _________to safely control buoyancy as you descend. Which of the following limits should be established prior to every scuba dive? Maximum bottom time, maximum depth, minimum air pressure.

What is considered altitude diving?

Any time you scuba dive at an altitude higher than 300 metres/1000 feet above sea level, you’re altitude diving.

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What is NDL diving?

The no decompression limit (NDL) is the maximum allowable dive time that you can remain at a specific depth and ascend directly to the surface without requiring staged decompression stops on the way up. Remember the higher the partial pressure of nitrogen (ppN2), the shorter the dive time (NDL).

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).