I wrote a thing about a thing that I am baffled isn't taught more.
Newer divers: do some math.
Mentors: help them do some math.
https://www.xoc-ha.com/post/two-plus-two-equals-purple
Newer divers: do some math.
Mentors: help them do some math.
https://www.xoc-ha.com/post/two-plus-two-equals-purple