MOD Tank Markings

[filtered]

your first deco bottle should be MOD marked for EAN50. Tech 1 teaches u to deco on 50%. O2 use is only incorporated in Tech 2

 

[Uncle Pug]

Tech 1 is a single deco gas... O2 (OXYGEN 20) or 50/50 (MOD 70)

 

[filtered]

Tech 1 is a single deco gas... O2 (OXYGEN 20) or 50/50 (MOD 70)

http://www.gue.com/classroom/standards/PDF/GUE_Standards_2003v2a.pdf

Under 2.2.1.10, Equipment Requirements, it says Divers must have access to one deco cylinder of 50% Nitrox.

 

[Uncle Pug]

2.2.1.10 is the required equipment for the class.

2.2.1.1. d)the applications of single decompression stage diving with respect to decompression procedures.

Not saying you don't know a lot more about it than I do but my GUE Tech 1 card says, ... oxygen decompression, nitrox.

 

[The Chairman]

I have to ask... what size tank do they recommend? Is 40 enough, or do you need an 80???

 

[salty]

Deco tanks are sized to the dive but the dives are limited by conditions. In general open ocean dives should have a limited total run time, I think the recoumended time is around 90 miniets. For a dive of this type 40 cf tanks are more than enough. For cave dives it may take 80's or several 80's to complete decompression.

The ocean dives are limited to account for changing conditions, it is expected that divers will be mindful that the ocean can and does change its mood on a wim.