a discussion of ratios in instruction is something that affects how litigation in the dive industry occurs IMHO.No it isn't. It's the place to:
"This is the place to discuss court cases and legal matters that affect the SCUBA industry."
Standards, RSTC/ISO/Agency/Employer are something that comes up, and will be used to defend or prosecute even if the standard may not be your agency etc.
How agencies define stuff like confined water, open water, supervision , and more are all things that both sides will try and shape in court one way or another, and hire SME's to do so.
If this becomes simply "they broke standards so they are guilty" or they didn't break standards it must be the divers fault, then the purpose of discussing it is pretty lame.
Ultimately, discussions in here help shape how instructors teach, expose them to things they may not have considered. That will help dive safety.
Like the heart attack thing that Omission throw out above, it's correct stats wise. What he omitted (Love ya brother), and may not have considered is how many medical forms may have been filled out in a formal course that the student indicated something that the instructor didn't notice and didn't require a medical that had they noticed would have done so by standards (happens), how many the student may have lied on (it happens) and finally how many fill out a second form when the instructor notices something and says "you mark that you need a medical and will have to join the next class because we are starting too soon for you to get one" (it happens). The first two can be somewhat quantified the last virtually impossible. So possibly some of the heart attack numbers do rightfully belong under the heading of systemic failure somewhere on the industry side, most likely aren't and just happened with no games being played anywhere by anyone.
regardless, the fact is the recreational accident rate is within margin of error unchanged for like 4 decades plus. Gear has gotten vastly better and many, many things on gear side introduced that should have increased safety. Classes have changed. IMHO we "should" have much better accident rates than we do, why we don't concerns me. It doesn't concern others because they feel (maybe with a valid point) that diving is known risky and the rate is still better than other risky activities. We see more type 2 dcs hits now and in table days it was more type 1 hits in recreational diving. It's easy to understand why but the amount of people getting bent per 100000 dives is pretty much the same for stats. The resolution of those hits medically are not pretty much the same. Using one stat without the other is marketing not research , again IMHO.
In CCR (and those stupid FF snorkel masks) we are seeing the return of more IPE like we saw in the 60's-70's. Again the reason is easy to understand but still the numbers are so small, will the needle get budged in overall accident stats? Not so much.
All of this crap eventually sees the inside of a courtroom, so all of it relates tangentially to litigation.