But that is the exact same thing. It increases the amount of hull repaired per second, allowing your ships to heal more quickly. Its fully moddable and always has been. That or I'm not understanding what you mean by "Active Hull Tanking".

Yeah, the passive regeneration (basically the passive hull regeneration like Semaz stated) is what I am talking about.  From all of my testing it seems like modifying the hull repair rate just increases the quantity of hull points restored over a constant time interval.

While this does modify the regeneration in HULL/SEC, the issue is that ships die to volley fire because the regeneration does not cycle every second.  It could be 5 seconds, or maybe even 10-15 seconds ( probably game lag causes the delay, which tne causes your ships to die ).

It would be nice if they were more clear wether the regen adjustment affected the regeneration (cycle) time, or just hull points regenerated, or both.

I believe the numbers in the entity files are per second. Internally I think its applied consistently, its just the infocards only update themselves every 5 seconds or so.

Again I think internally it handles the damage in real time, its just the visual stuff like affects and infocards do not update instantaniously. I often see my LRMs stop shooting at a target before it actually dies, this is because once the target internally dies it tells the ships firing it to pick a new target. It may still appear alive and missiles will be heading towards it but most of the time it knows which volley inflicted the killing shot.

That said, I've certainly seen a few bugs in this system as well. and perhaps my observations are due to a more complex issue.