Those decisions are made by the dive operators, not the trainers or agencies. ...............
I was not critical of individuals or agencies, but I do believe the practice is undermines training outcomes. That comes back in the cost of insurance premiums on the operators.
A few years ago a Virginia instructor led a line of students on a dive with no DM in sweep...............................
I don't advocate for this. If the group size or skill level warrants an instructor and DM, only a fool doesn't mitigate by available means, ie reduce the group size. In this case I'd suggest the instructor should sweep, if the instructor must lead they must be looking back regularly. It is essential to lead if the goal is to demonstrate buoyancy or managing swell or fin techniques etc. As such that lesson plan should have a clear control for how to maintain group contact and the instructor should monitor that from the front. Might be a DM, might be that a group of certified divers can watch each other and letting the dive leader know. Whatever it is, brief it and check it, as per standard risk management process to ensure it is effective. If I ask a student every 90sec where their buddy is I'd suggest the behaviour gets reinforced, if I never do then I cannot be shocked if their focus wanders. My IDC didn't put much into risk management, its easy to empathise with instructors having little awareness of it. In heavy industry its a core role requirement for every leader and trainer.
This feels very much like the scenario where each diver defers everything to the instructor, who is out the front doing all the thinking, which is exactly what I think needs to change. I'd be curious how he briefed the dive, but a life is lost.
I don't know what this means.
As a teacher, if I recall your background, you would not limit your teaching to your core subject and classroom boundaries? Certainly in my industry we are expected to go beyond our teams to enforce standards and develop our culture, especially workplace safety. That is the gist of my point.
Dive #4 of the PADI OW course requires that the students plan and execute the dive on their own...............
Not where I was going with this, but certainty require OW students manage a dive within the bounds of their competence. Probably not yet leading at AOW level if they're like me and did it pretty early; but if a diver is able why not give them a task not on the slate but is part of the dive? Give them rope, just keep hold of it. I don't normally dive with really new divers anymore so I won't digress further. Categorically the instructor needs to be in control for the new skills and new depth etc, but a good chunk of continuing education dives is commuting. Con Ed is where I was thinking divers need to show more personal accountability, and where instructors could mentor those broader or deeper skills. An MSDT can have a different approach to an OWSI, Trimix can be treated differently to ITT.
When experienced divers behave like their cert level, dives go much more smoothly with a lot less hanging around. Indemnity insurance does not impede this and many divers are lazy enough to just go with it. The end result is when the instructor is not on subsequent dives, the broader decision making is not practiced and the skills gap is wider than it could have been.
If we talk Trimix, what new skill is added in the course, especially if the student has ER? So a buddy pair should be able to descend, find the site/depth, hit the deco obligation, monitor gas, call the turn, ascend, gas switch, clear deco and surface, without the instructor initiating any steps. At many points in that dive there are skills to validate competency, some that I can initiate, some that you need to. If you're leading, the moment you turn around I know an S drill or other skill is coming and I'm getting ready. If I'm navigating its more likely to be a surprise and a much better test of my skills. Why not give me the site map, tell me how much water you need, any run-time limits and any depths/times for skills, then let me plan and brief this dive? My buddy does the next one, etc. Its just a thought, I'm not ready to argue that it is a plausible change to foist on the industry, though I'd wager smaller clubs do it.