chip&dale&fun said:
No - neither of us are advanced...Do we/should we take the advanced course for our May trip?
I am planning on taking Nitrox course but I am still uncertain of diving with Nitrox due to the "warnings" about gas mixtures and dive shops.
So, please spill you experiences. Thanks....
We won't be doing anything on the May cruise that will require an advanced certification (although both Matt and Alicia are advanced certified too).
Nitrox is a great gas mix for diving. It will allow the diver to lengthen the bottom times and shorten the surface interval. Due to the increased oxygen content of nitrox (28% to 40% O2) over standard air (21%) the mixed gas will reduce the nitrogen loading on the body. This greatly reduces the fatigue the body feels after a few dives. Plus, it's highly recommended for the "older diver"!! (the older you get, the less efficiently your body off gasses). Some of smart alecks call it "geezer gas"
The only drawbacks are the MOD (maximum operating depth). Higher % of oxygen will increase the ppO2 (partial pressure of oxygen) and at depths will increase the chance of oxygen toxicity. Not to worry, we are talking about depths below 110' on a mix of 32%.
For instance:
You are planning:
* for an oxygen content of 32% (FO2)
* to accept exposure to an oxygen dose of 1.4 ATA (PO2)
Executing your plan, you would:
* be limited to a maximum operating depth of 111 fsw (MOD),
at an ambient pressure of 4.3 ATA
* plan your decompression for an equivalent air depth of 92 fsw (EAD),
or 3.8 ATA
The difference is where Nitrox shines.
If you want to learn a bit more before the class,
check out this link Take the class, it's not hard and when you get past the hardcore info, it's just gas you breath the same way you would air!!
You just have to plan your dive, AND dive your plan!!
Now, back to the regularly scheduled program....... 