This is a generic linearized threshold rule of what Joh has actually shared, which makes it simpler for recreational divers to have an easy buffer / calculation of their no fly times without a computerSeems like lots of folks are overanalyzing this (imho). I’d guess that you likely have 12 hours after you complete your dive to before you fly? If so, you are good against the widely accepted DAN guidance:
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Guidelines for Flying After Diving
The recommendations for flying after diving come from a DAN study — read all about the study workshop and conclusions.dan.org
It bases on the more complex tables that account for altitude and such
Sometimes after repetitive deco diving, my computer tells me I have 7h of no fly (because of my efficient accelerated deco)
Still good to leave a buffer
Of course when in doubt/without table, easiest/safest bet is the DAN recommendation, and to err on the side of safety