eelnoraa
Contributor
With single tank, my bottom time is limited by gas mostly. With double, I found my bottom time is limted by MDL if the dive site is at the 70-90 ft range. Let's say I have no plan to go below 100ft, what kind of training/class should I take to gain deco knowledge? GUE R3 says 130ft/15 minutes and T1 says 170ft/30min. But what if I want to do 100ft/60minutes or 80ft/80min kind of dive, will I be able to do it with R3 knowledge? or do I need T1?