I am an instructor for a 28 member Public Safety Dive Team. We dive primarily in cold water and use full-face masks and dry suits. We have both EXO 26 masks and AGAs.
Over the past two months several (9) of my divers have complained of severe headaches post dive. None of these dives exceeded no-deco limits and there were no rapid ascents or other mishaps. Also, all symptons resolved with no further problems. (The incidents all occured after deeper dives - 60+')
I am concerned about what seems to be becoming a fairly recent trend. After a little research I suspect Co2 build-up??? But, why now and not before.
Any other posibilities???
I have been researching US standards for "Class E" air and am finding conflicting numbers for Co2. Some sources say 500 ppm others say 1000 ppm. Anyone know??
(Canadian standards say 500)
The last test of our fill station showed 565 ppm Co2. This is an increase from the previous test which was 310ppm. Could this be part of the problem?
Any help appreciated...
Thank you
am
Over the past two months several (9) of my divers have complained of severe headaches post dive. None of these dives exceeded no-deco limits and there were no rapid ascents or other mishaps. Also, all symptons resolved with no further problems. (The incidents all occured after deeper dives - 60+')
I am concerned about what seems to be becoming a fairly recent trend. After a little research I suspect Co2 build-up??? But, why now and not before.
Any other posibilities???
I have been researching US standards for "Class E" air and am finding conflicting numbers for Co2. Some sources say 500 ppm others say 1000 ppm. Anyone know??
(Canadian standards say 500)
The last test of our fill station showed 565 ppm Co2. This is an increase from the previous test which was 310ppm. Could this be part of the problem?
Any help appreciated...
Thank you
am