On Sun, Jul 5, 2015 at 11:03 PM, Rick Walsh <[email protected]> wrote:
> Serious question: does anyone switch to 50% at 22m? > For tank MOD markings around me usually round to the nearest 3 (meters). So 21 meters (not 22) for 50% and 6 meters (not 5) for o2. Etc. Also to the nearest 10ft. Henrik
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