Leatherboot69
Contributor
There is no practical way to record number of dives. I don't know how estimates are being made. I'd be curious as to their confidence percentages. Number of tank fills would be a decent approximation for recreational divers. As tech divers are a small number in comparison, my guess is the numbers by all their cylinders would not skew the results too much, especially as deco cylinders. The non-peasant CCR divers (a joke people! ) are too small in number to even bother factoring into the equation.
If it’s good enough for DAN, the medical profession and the HSE it’s good enough for me.