Error 130 dives on Fake Nitrox

[dmaziuk]

Her

Well, if our world was perfect, won't this be a little too boring?

I know: I still get occasional complaints from the users that e.g. my file format conversion program does exactly what it says: convert file format, and not atom nomenclature therein. I've long given up on explaining that yes, we could do that, but then I'd have to ask if 'A' stand for 'A" or 'DA' or 'ALA', or more than one if it's a hybrid sequence, or none of the above if it's the modified residue, and that would seriously complicate the user interface and p*ss off everybody uploading the straight protein or nucleic acid sequence. You just chose one and live with the wailing and whining.

 

[Kendall Raine]

You just chose one and live with the wailing and whining.

Bumper sticker.

 

[Dan G]

There was some computer that would reset to a fictive 50% O₂ / 79% N₂ mix, thus giving the nitrogen loading of air with the MOD of the hottest nitrox mix. I guess it makes some sort of sense as a worst-case default to protect against a forgotten gas setting.

Oceanics do this, unless the user goes to the settings menu and turns this setting off. Reminds me a bit of how there are gas hot water heaters that when the gas supply to the HWH was shut off, it caused a specific part that regulated gas flow to break and require replacement. This made re-lighting the HWH impossible unless you knew to replace the part and knew how to replace the part. Fortunately the part only cost a few dollars, but the "forced safety" element seems the same as the Oceanic FO2 setting. In both cases, as simple reading of the directions explained all of this.

 

[dmaziuk]

It's called "fail safe": make the system impossible to use in order to prevent worse damage. The alternative is "graceful degradation" where the system continues to operate in a "reduced" capacity.

The textbook SCUBA example is computers that lock you out after violating mandatory deco vs. the ones that don't.