Understanding Enriched Air Nitrox

Questions: What is your RNT and your ABT values for the second dive to 80fsw on EAN32? (hint: found in the Air RDP Table #3)

Answers: 9 and 31 respectively.

You may now plan a second dive to 80fsw on EAN 32 to be no longer than an ABT of 31 minutes…

See how this is performed.. You continue through the series of steps until the fourth dive.

You take over from here..

Let me summarize so far so the information we learned into one area. You take over the remaining calculations starting at Dive 2. I will provide you with some information so that we may remain consistent on our results.

Answer each question as they are presented before moving on. The answers will follow at the end of this exercise.

Previously provided info in Blue Additional Info I am providing in Red

(1st) 100fsw, (2nd) 80fsw, (3rd) 60fsw and finally (4th) 40fsw.

Dive 1) 100fsw on EAN32 for 15 minutes. Exit the water in Pressure Group: H. A 1 hr surface interval brought you to Pressure Group: B.

Dive 2) 80fsw on EAN32 Dive time: 20 minutes

Question: What is the EAD for 80fsw on EAN32?
Your Answer: 64fsw

Question: What is your Pressure Group at the end of your 20 minute dive?
Answer: N

Question: What is your Pressure Group after a 1 hr Surface Interval?
Your Answer:

Dive 3) 60fsw on EAN32 Dive time: 45 minutes

Question: What is the EAD for 60fsw on EAN32?
Your Answer:

Question: What is your Pressure Group at the end of dive 3?
Your Answer:

Question: What is your Pressure Group after a 1 hr Surface Interval?
Your Answer:

Dive 4) 40fsw on EAN32 Dive time: 60 minutes

Question: What is the EAD for 40fsw on EAN32?
Your Answer:

Question: What is your Pressure Group at the end of dive 4?
Your Answer:

The Answers to the above questions. Don’t peek until you answered the questions just above.

Dive 2) 80fsw on EAN32 Dive time: 20 minutes

Question: What is your Pressure Group after a 1 hr Surface Interval?
Answer: D

Dive 3) 60fsw on EAN32 Dive time: 45 minutes

Question: What is the EAD for 60fsw on EAN32?
Answer: 47fsw

Question: What is your Pressure Group at the end of dive 3?
Answer: U

Question: What is your Pressure Group after a 1 hr Surface Interval?
Answer: G

Dive 4) 40fsw on EAN32 Dive time: 60 minutes

Question: What is the EAD for 40fsw on EAN32?
Answer: 30fsw

Question: What is your Pressure Group at the end of dive 4?
Your Answer: R

BUT WAIT! There’s more!

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