Q re: N2 loading bar on Peregrine

[melliodora]

Response from Shearwater:

"I'll review that definition in the manual with other members of our team to see if it is the best way to word it when it does simply say "it is full once decompression stops will be needed".

The N₂ bar is designed to give you a quick visual of your overall nitrogen loading. It’s scaled conservatively, so it can show full even when you still have no-stop time left. It’s not an indication of a problem with your computer or settings, and just a reminder that you’re near the upper end of your NDL range.

Because it’s a broad, summarized, and conservative overview, the N₂ bar can show as full even when your detailed Tissue Bar Graph still displays compartments in green or yellow. That tissue screen gives the more accurate picture of nitrogen loading in different compartments, and the fact that those remain green or yellow confirms that you’re well within safe limits, even when the mainscreen N₂ bar looks full.

You’re interpreting your dive data carefully, and that’s great to see especially after your DCS experience. The behaviour you’re seeing is expected. I understand the confusion though and I'm sharing your email with other members of our team for review of its wording."

 

[johndiver999]

I always read about how these computers are a "must have" and then when I read that a bar graph that shows loading does not really show loading - in the simplest terms possible, I'm confused.

Why would they make a bar graph that does not represent EXACTLY what someone would expect it to do?

I use much simpler and older oceanic computers (with one button) and they have a bar graph that fills up and shows very clearly when you go from no deco to deco. It is a nice sanity check when you glance at the computer and perhaps when you are a little narced, distracted, cold or stressed.