RDRINK25
Contributor
If all I have is 19hrs before a flight home would nitrox be a better choice? The max depth on the last day wont hit 100' if so what blend should I use? Or should I not even bother with the nitrox?
flying and nitrox
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Tool Belt
Contributor
According to the latest DAN recommendations 19 hours is fine on either.
"Multiple Dives per Day or Multiple Days of Diving: A minimum preflight surface interval of 18 hours is suggested"
"Multiple Dives per Day or Multiple Days of Diving: A minimum preflight surface interval of 18 hours is suggested"
Scott L
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MuddyRubberDuck
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PfcAJ
Contributor
Seems like the op is doing multiple days of diving, with the last day not surpassing 100'. I could be way off base here, but it sure does seem like a time for nitrox.
Scott L
Contributor
Huh? With our (Palm Beaches) prolific diving in the 55' to 120' range I would venture to say 95% of the locals dive nitrox. What constrictive/restrictive issues would one have at 100' diving nitrox other than basic MOD limits?
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It would indeed be the basic MOD limits.
The endless debate over using nitrox as a tool or as a toy.
What came first, the card collector... or the perceived "need" created by cert agencies and instructors?
If you don't need it (for NDL on repetitive dives), then why pay for it? And...
why limit your max depth in a rescue situation?
PfcAJ
Contributor
because you're soooooo limited by CNS in that "situation". Come on...
With the exception of wall diving and blue water diver, most of the time the max depth is the bottom. Can't go much deeper than that without a shovel. And guess what, if you need to drop below MOD for a min to catch a clown, its ok. MOD is max OPERATING depth, not some mystical number where you die just because you cross it. Plus, even if you don't "need it" for NDL on repetitive dives, you're accumulating less nitrogen which pushes you ever farther from the deco threshold (which is quite variable).
Sheesh.
With the exception of wall diving and blue water diver, most of the time the max depth is the bottom. Can't go much deeper than that without a shovel. And guess what, if you need to drop below MOD for a min to catch a clown, its ok. MOD is max OPERATING depth, not some mystical number where you die just because you cross it. Plus, even if you don't "need it" for NDL on repetitive dives, you're accumulating less nitrogen which pushes you ever farther from the deco threshold (which is quite variable).
Sheesh.
txapacheguy
Contributor
Even though DAN says 19 hours is enough, if you have the cert, access to the nitrox, and don't mind paying an extra few bucks for it, you are all the better for doing so. I would dive the richest mixture I could get that whose MOD would be within my planned dive profile. No one should argue the fact that the less nitrogen you take on a plane, the better off you are, especially in the unlikely event of loosing cabin pressure in flight. At 19 hours though, I would think that you would indeed be OK in either case. Have a great trip and dive safe!!!
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