I get it, I was just picking on your terminology.You can analyze and check the tank pressure all in one. Super nice when you have multiple tanks your diving between. Same for B/O that you have in storage and use for different dives. Just a habit but I always analyze and check tank pressure even if its a B/O I labeled up a couple months ago and I know its just been sitting there I will still analyze.
Kind of sucks with you grab a tank analyze it, make a nice label, rig the thing up or strap it to your unit to and find out you only have 150bar.
Also very nice for teaching for filling out gas logs. First thing you do is analyze and write mix and pressure. Now you can do that right away instead of analyzing and the later having to get the pressure once you rig the tank up.
Oh yeah also nice to if you bosh your mix up, gives you an instant idea how much you can throw on top of it.
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You specified submersible, seemed like an odd choice.