When diving at higher altitudes the proper ascent rate is?
What two steps would you follow to make a proper ascent at altitude? 1) Ascent rate is half the sea level max rate: 9 meters / 30 feet per minute or slower. 2) Make a three minute safety stop at prescribed depth on the Theoretical Depth at Altitude chart on all dives.
When should I use Nitrox?
Advantages of Diving with Nitrox
The best application of nitrox is in the 50- to 100-foot range. No stop times for dives shallower than 50 feet are often so long that you’ll empty your tank before you run out of dive time.
How do I calculate altitude?
The density of that fluid—air—changes as the weather and altitude change.
Techniques to calculate density altitude
- Subtract the current altimeter setting from the standard pressure of 29.92.
- Multiply by 1,000.
- If you have a negative number, subtract it from the field elevation. Add a positive number.
How soon can you fly after diving?
For a single no-decompression dive, the recommendation is a minimum preflight surface interval of 12 hours. For multiple dives per day or multiple days of diving, the recommendation is a minimum preflight surface interval of 18 hours.
How high can you go after diving?
So the standard advice rings true: don’t fly or go beyond 300 meters or 1,000 feet for at least 24 hours after your last dive.
What is the maximum allowable time for the second dive?
What is the maximum allowable time for the second dive? METRIC — RDP table or eRDP: You are a newly qualified instructor and you are planning to make two dives. The first dive is to 21 metres for 30 minutes, and the second dive is to 15 metres for 36 minutes.
Can I dive high?
Having high blood pressure puts you at increased risk whilst diving. It is a major risk factor for having a heart attack or a stroke, both of which could be fatal underwater. Over time, high blood pressure can damage the blood vessels in the body, and the heart muscle itself.
Can you dive after flying?
Although there should not be any problem to dive after flying, remember to hydrate properly during the trip. Since dehydration is a factor that makes it difficult to eliminate inert gases and as you know, nitrogen is one of them. Besides, long-distance trips can cause sleep disturbances and jet-lag.