I thought I understood Nitrox but following 3 days of concentrated EAN diving my computer indicated a dive time remaining of zero following a relatively short bottom time (about 19 minutes at about 60' depth) due to 02. Plenty of gas and no deco time left but the 02 went into the red, the up arrow was flashing and DTR went to zero and stayed there for the remainder of the dive.
I checked my backup computer figuring there was a malfunction but the numbers were the same. A few minutes later my dive buddy swam over and showed me her computer (same Oceanic algorithm although she dives a Veo and I have a VT Pro), which said the same thing.
I gave her the "it's ok, disregard sign" and we both continued our dives for another 25 minutes or so, followed by a second and final dive which was not limited by 02, and neither one of us had convulsions and spit our our regs.
I checked my P02 screen and at the time of the warnings I was at 1.03 and during the remainder of the rest of the dive the number dropped to about .95. Our computers P02 level is set to 1.6
We did the following dives:
Friday: 2 dives to 109' for 32 minutes each on EAN 32
Friday night 1 dive to 80 feet on EAN 34 for 57'
Saturday 5 dives to depths of about 90' for about 40 minutes each, on EAN 34, and 1 dive to 70' for 57' on EAN 34. (6 dives total on Saturday).
Sunday 4 dives to depths of 96' 33 minutes, then 67' for 56 min, 82' for48 min, then 69' for 50 min on EAN 36.
It was the 2nd morning dive on Sunday that gave the 02 warning.
The computers read close to the 02 limits for the last 2 dives on Sunday but never reached them.
Can someone please clarify exactly what happened during these dives and exactly what risk we were exposed to by simply disregarding the computer's indications.
Thanks
I checked my backup computer figuring there was a malfunction but the numbers were the same. A few minutes later my dive buddy swam over and showed me her computer (same Oceanic algorithm although she dives a Veo and I have a VT Pro), which said the same thing.
I gave her the "it's ok, disregard sign" and we both continued our dives for another 25 minutes or so, followed by a second and final dive which was not limited by 02, and neither one of us had convulsions and spit our our regs.
I checked my P02 screen and at the time of the warnings I was at 1.03 and during the remainder of the rest of the dive the number dropped to about .95. Our computers P02 level is set to 1.6
We did the following dives:
Friday: 2 dives to 109' for 32 minutes each on EAN 32
Friday night 1 dive to 80 feet on EAN 34 for 57'
Saturday 5 dives to depths of about 90' for about 40 minutes each, on EAN 34, and 1 dive to 70' for 57' on EAN 34. (6 dives total on Saturday).
Sunday 4 dives to depths of 96' 33 minutes, then 67' for 56 min, 82' for48 min, then 69' for 50 min on EAN 36.
It was the 2nd morning dive on Sunday that gave the 02 warning.
The computers read close to the 02 limits for the last 2 dives on Sunday but never reached them.
Can someone please clarify exactly what happened during these dives and exactly what risk we were exposed to by simply disregarding the computer's indications.
Thanks