Flying 12 hours after short (30-45 min) shallow (15-20 feet) "baptism" dive

[torarnv]

Hi,

I had my first dive ever this morning, and it was awesome! The dive was a basic "baptism" dive:

• 30 minutes at 10 feet

Now, I booked another dive tomorrow morning (24 hours later), more or less the same thing:

• 45 minutes at 15-20 feet

But I'm concerned about getting the bends as I'm flying 12 hours after the dive tomorrow.

From what I've read, you should ideally wait 12 hours after a single dive, and 18 hours after multiple dives, but does this hold even for these kinds of short and shallow dives?

Btw, I'm drinking lots of water right now to hydrate.

Thanks!

---------- Post Merged at 06:54 PM ---------- Previous Post was at 05:21 PM ----------

Okey, so combining this:

http://www.ndc.noaa.gov/pdfs/NoDecoAirDiveTable.pdf

With this:

http://www.ndc.noaa.gov/pdfs/AscentToAltitudeTable.pdf
(edit, more recent version: http://www.ndc.noaa.gov/pdfs/Rev_6_495.pdf)

It appears my first dive at max 10 feet for less than 60 minutes would put me in group A, which is 0:00 wait time across the board, even for 10K feet.

The (possible) followup dive would be 24 hours later, 20 feet max, and less than 50 minutes, putting me in group B, which has 0:00 wait time for 8K and 9K, but two hours for 10K.

Seems 12 hours should be plenty if I only had that last dive, but I'm curious how the first dive affects the chart/calculation. The first dive has 0:00 wait time across the board, indicating the nitrogen levels in my body should be very low or all gone 24 hours later, but I'm not sure. I tried interpreting this chart:

http://www.ndc.noaa.gov/forms/New_NOAA_Air_Deco_Tables_2008.pdf

But I couldn't really follow the arrow and numbers, and the chart starts at 40 feet, which is way deeper than in my case. Could someone help me interpret the updated chart?

Thanks! :cool2:

 

[Doc]

Could someone help me interpret the updated chart?

Nope, not me. If you're "short" of the chart, you're not on it and it can be of no use.

But I will tell you this- enjoy the flight.

I don't see any issues or problem.

 

[Danseur]

Fly. No issues, not nearly deep enough...

 

[DevonDiver]

I don't see a big issue with this, assuming the depths/duration you've quoted.

I would add a note of caution regards the dive profile though - as with any dive - keep the ascent slow and avoid saw-tooth profiles (up and down during the dive)... your buoyancy control is important in that regard.

 

[TSandM]

I think your biggest likely issue will be with your ears

(Going up and down repeatedly in very shallow water puts a lot of stress on the middle ear, so be very careful with your equalization!)

 

[DivemasterDennis]

You're good to go.