Question Diving before flight

[tursiops]

I suspect the majority of airports in the world are not at sea level. If their guidance did not apply to these cases, don't you think DAN would have a caveat or footnote to that effect? Perhaps added to the 24+ hr category as "mandatory deco or landing above sea level"?

Wikipedia has a list of the highest airports.

List of highest airports - Wikipedia

en.wikipedia.org

They do not trike me as the destination airports for a lot of divers....

I'm not going to try and guess what DAN ought or ought not do, DAN US and DAN Europe don't even agree on the recommendation for wait-time before flying. Flying to a high-altitude airport is mpt the leding term in the equation.

 

[boulderjohn]

I don't see any reason why you can't fly to Denver. You are supposed to wait because you are flying an airplane pressurized to 7,000-8,000 feet. That is where the concern is. Descending to Denver's altitude of 5,280 should not be a problem after that. I have never, ever seen a warning in any literature about where you go after the flight, unless it would be to a lesser pressure than the flight itself.

 

[iointerrupt]

A "shallow dive" on 30% is in the "is it possible to get DCS at all" territory.

Is DCS possible under 20fsw, or 100% impossible?

Hello all, I am curious to know if it is even possible to develop DCS on air under 20fsw while within NDL and while being conservative? Say a water temp of 65F. Is it even physically possible for one to become bent under 20fsw or 100% impossible? Sorry if this is stupid question, its just been...

scubaboard.com

If there was any DCS risk from doing a near unlimited NDL dive for one hour, and then waiting a further 18 hours, there would be a lot more bent vacation divers.

 

[milehighdivers]

I appreciate the lively discussion everyone! Yes, we do have a brief layover in DC from 3-4 pm, then it's 4 hours to Denver. I'll reach out to DAN for the official word. I should have thought about that first, but it's our first time to get their insurance too! If it's close to a concern at all, we will just wait for the next dive trip Thank you!

 

[CWC]

I appreciate the lively discussion everyone! Yes, we do have a brief layover in DC from 3-4 pm, then it's 4 hours to Denver. I'll reach out to DAN for the official word. I should have thought about that first, but it's our first time to get their insurance too! If it's close to a concern at all, we will just wait for the next dive trip Thank you!

It’s not close to being a concern. Your plan is well within DANs recommendations, and the fact that you’re going to Denver doesn’t change the recommendations. Have a fun trip and enjoy the dives!

 

[BackAfter30]

I suspect the majority of airports in the world are not at sea level. If their guidance did not apply to these cases, don't you think DAN would have a caveat or footnote to that effect? Perhaps added to the 24+ hr category as "mandatory deco or landing above sea level"?

The majority of the worlds cities, thus airports, are in the 0 to 1000ft range.

 

[Rob9876]

A "shallow dive" on 30% is in the "is it possible to get DCS at all" territory.

Is DCS possible under 20fsw, or 100% impossible?

Hello all, I am curious to know if it is even possible to develop DCS on air under 20fsw while within NDL and while being conservative? Say a water temp of 65F. Is it even physically possible for one to become bent under 20fsw or 100% impossible? Sorry if this is stupid question, its just been...

scubaboard.com

Just wanted to point out that in the OP's first post he used the term "shallow" to mean <60 feet, which is a little deeper than I first thought of as shallow for Keys diving purposes. Agree that if OP was using 30% on a 30 foot Key Largo reef dive that it would seem there would be very little Nitrogen absorption.

 

[inquis]

I have never, ever seen a warning in any literature about where you go after the flight, unless it would be to a lesser pressure than the flight itself.

Nor have I. Further, DAN offers the same 12/18/24 hr guidance for people whose home is at a higher elevation than the dive site when queried as to the "time to drive".

 

[OMyMyOHellYes]

I fail to see a need for a call to DAN.

I imagine it might go something like:

"Hi, DAN. We'll be doing a single dive to 59 or fewer feet in depth and then flying about 17 hours later, which is considerably more than the 12 hours you recommend as a surface interval. Would you recommend us ignoring your 12 hour guidance and staying on the ground even longer?"

Just mi dos centavos.

 

[L13]

Day 1: afternoon shallow (< 60 ft) 2-tank dive with 30% EANx
Day 3: evening shallow 1-tank dive with 30% EANx ...

You will be fine, but if you want to be even safer use a higher EANx. At the depths you will be diving, you will be good all the way to the 40% you will be qualified for.

I don't know about the dive op you are going to use, but most have 32% on hand.