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krivitski

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Posts: 4
Reply with quote  #1 

Niiiiice day at Dutch Springs.  Kinda chilly.  This'll help with Michel's nitrox homework.  This is version 2 with SAC in cubic feet/minute and this time I wasn't narc'ed when I typed the formulas

 

v     EAD:

 

Fresh

FN2 x (depth + 34)     -34

            .79

Salt                                          =          feet (round up) 

FN2 x (depth + 33)     -33

            .79

 

 

v     MOD:

                                                   34 feet/fresh

(PO2 max(1.4 or 1.6)   -1)     X        or                     = feet (round down)

FO2                                                   33 feet/salt

 

 

v     Best Mix:

Fresh

1.4 or 1.6 PO2 max      =  .xxx  X  100  =   xx.x% O2

(Depth / 34) + 1 ata

 

Salt

1.4 or 1.6 PO2 max      =  .xxx X  100   =   xx.x% O2

(Depth / 33) + 1 ata

 

 

 

SAC (Surface Air Consumption) in psi/minute:            DCR (Depth Consumption Rate):

 

Fresh                                                                            psi used     =  xx  pounds/minute                                                              dive time

                                                                                  

DCR x 34        =  xx.x pounds/minute

Depth + 34

 


Salt

 

 DCR x 33       =  xx.x pounds/minute

Depth + 33

 

 

SAC calculator in cubic feet/minute and other cool stuff:

http://www.spearfishing.org/bruces_tips/java/sac.html

 

SAC in cubic feet (ft3)/minute:

 

[psi used (tank volume rating

               tank pressure rating)

              time at depth              ]

      (         depth            + 1 ata

      33 fsw or 34 ffw) 

 

 

 

 

 

 

 

 

 

 

I, Victor Krivitski, make no claims to the accuracy of the information given here.  Nitrox should only be used by individuals with proper training, certification, and equipment.

 

Sorry I couldn't make this an attachment.   I have a printer-friendly version of you email me.

I made this cheat sheet all by myself.  Pirate at will.

 

see ya underwater,

 Victor

 

marcy

Registered:
Posts: 6
Reply with quote  #2 

Vic,

 

Thank you so much!  It was nice taking the course with you.  You are such a help.

 

Have a nice holiday,

marcy

 

 

sutton

Registered:
Posts: 43
Reply with quote  #3 

hey thanks alot for the cheat sheet.the dry suit will be at gene's today.

oh ya did anyone else report headache after the second dive.lou and myself

had quit the bangers.hope everyone has a great thanksgiving.

 

                              see ya,

                           Sutton(stalker1-1)

LMiller

Registered:
Posts: 51
Reply with quote  #4 

Thanks a lot vic,  If I can ever do anything for you just give a yell.  Take care and have a great Thanksgiving!!! Actually,  Happy Thangivings to everyone, you are a great group of people!!!!

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