simple Nitrox modelling software?

[in2deep]

Hi there -

I'd like to model multiple day dives using different air/nitrox mixes – checking how a given mix for a given dive will affect dive times for later dives. Nothing too technical...

Does anyone know of any simple diving shareware or spreadsheets that can do this? Most software I've seen so far has been orientated to decompression dive planning. .

Just want to check what difference switching to nitrox would make on my next liveaboard trip – is the extra time really worth the extra cost?

I've left my computer and all my dive tables at home in another country..

Cheers,
Rohan.

 

[Diver0001]

in2deep once bubbled...
Hi there -

I'd like to model multiple day dives using different air/nitrox mixes – checking how a given mix for a given dive will affect dive times for later dives. Nothing too technical...

Does anyone know of any simple diving shareware or spreadsheets that can do this? Most software I've seen so far has been orientated to decompression dive planning. .

Just want to check what difference switching to nitrox would make on my next liveaboard trip – is the extra time really worth the extra cost?

I've left my computer and all my dive tables at home in another country..

Cheers,
Rohan.

IIRC the suunto website has some software that works in simulation mode for one of their computers.

Also something like GAP isn't too hard to get your mind around and it will do the job.

You can also work it out on tables. Putting together a spreadsheet in Excel to automate the PADI tables is a simple matter. I have one that I made (only took a couple of hours) but I'm reluctant to give it to anybody to use for actual dive planning.

I do, however, have all the PADI tables, including the Nitrox tables in Excel format if you want that. If you use the Air table with EAD and work out the PPRO2 by hand then you can use the air table for any nitrox mix you like. That's what my spreadsheet does.

R..

 

[medical1]

Just posted this on another thread. http://www.schmidt.as/NitroxPlan.htm . Web-based but very user friendly. Enjoy

 

[Charlie99]

Diver0001 once bubbled...
If you use the Air table with EAD and work out the PPRO2 by hand then you can use the air table for any nitrox mix you like.

The standard EAD tables convert even 10' increments on nitrox to an equivalent air depth which you then have to round up to the next 10'. This Equivalent Nitrox Depth table works in reverse --- it converts the even 10' air depth increments of the tables to the equivalent nitrox depths for different mixes.

 

[Don Burke]

in2deep once bubbled... Hi there -

I'd like to model multiple day dives using different air/nitrox mixes – checking how a given mix for a given dive will affect dive times for later dives. Nothing too technical...

Does anyone know of any simple diving shareware or spreadsheets that can do this? Most software I've seen so far has been orientated to decompression dive planning. .

Just want to check what difference switching to nitrox would make on my next liveaboard trip – is the extra time really worth the extra cost?

I've left my computer and all my dive tables at home in another country..

Cheers,
Rohan.

Hi Rohan,

I suspect you'll find the answer is dependant on the depths you are going to.

40 feet or less - probably not

40-50 - maybe

50 - 110 - I'd bet on it, at least to me.



For EAN 32, there are your Equivalent Air Depths:

Actual Equivalent
46 35
51 40
63 50
75 60
86 70
98 80
110 90


US Navy no stop times:

35 310
40 200
50 100
60 60
70 50
80 40
90 30
100 25
110 20
120 15
130 10

On a dive to 63 feet, you'll be on the 50 foot table, a gain of 50 minutes of bottom time or 50 minutes of safety margin or, more likely, some of both.