I have just recently (March 9th) completed full cave with my tech instructor with whom I have been working toward my full cave certification since last summer. In that time I have been in his Advanced Nitrox and Deep diving course, his cavern course, twin set course and then cavern to full cave that started about 3 weeks ago now.
In all of his courses, he created reallife scenarios that included no mask swims, buddy out of air, lost buddy, lost line, valve drills, following off the line without attaching a line:no, etc. and combinations of those. He never did anything in the water without first explaining it in the classroom or out of the water before a dive. What he did was to put me in the proper mindset to make some very serious dives in a foreign environment. He created a situational awareness in me that made me a better diver.
At no time during these drills did I feel in danger because I knew that this was training, and this was my time to learn to do this. When I was asked to keep my eyes closed, I did that. I wanted to know if I could really do this. I wanted to know that if I got myself into this situation, I would have the knowledge and skill and the memory of actually doing it in training, if only in a practice setting.
Yes, my instructor rolled off my primary valve during a blind lost line drill.
The first time he did it, I opened my eyes, and gave him the out of air signal, and seeing he was already so close having just rolled the valve, I realized right then what happened. So before I took his reg, I reached around and turned my primary back on. He got a chuckle out of that.
On a subsequent dive during a blind lost buddy drill, it happened again. This time I didn't open my eyes. I first went right to my backup regulator and began breathing from it right away, reached around and turned on my primary valve all the way, and went back on the primary reg without changing buoyancy and in a very short time. I could hear my instructor laughing through his regulator. So was I.
But the story doesn't end there. On a subsequent dive, at the beginning of the dive, I did not open my primary valve all the way on land. I got distracted and forgot about it. I had air, but the valve was not completely open when I jumped in the water. This was at Ginnie. As I was passing through the lips on the way back out from Cornflakes, my primary regulator stopped giving me air. I looked back and saw that my instructor could not possibly have rolled off my valve here at this place, especially since the flow was pushing me ahead of him. Again I put the backup reg in my mouth, opened my primary valve when I was through the lips and switched back to the primary reg. I had done this to myself this time. Somehow I had rolled off the primary when I went through the lips. Since the valve was not open all the way to begin with, it didn't take much to close it.
I am very proud of my tech instructor. He did his job well. An instructor's job should not be just to give lectures and watch students perform tricks in the water, it should be primarily to create thinking divers. That is what we really need. Panic is not an option in a cave. I want to be pushed to my limits and know what those limits are in a controlled environment, that being the training environment. That is what I am paying for and why I am in training. That being said, I don't believe that an instructor pulling my mask off my face and rolling my valves off is fair if he doesn't first tell the student about it. You have to set up the situational awareness in the student diver first. Doing these things without that awareness is what could create panic in a diver and may be unsafe.
But I strongly agree with the practice of setting up situations that force the diver to think, solve problems and resolve a situation, even situations with multiple issues. I am not an instructor, so I don't certify divers, but I do dive with them occasionally. I don't want instructors to hand out certifications to divers who will be a menace to themselves and possibly their entire dive team, whether that is in a cave or strolling on a reef in 40 feet. I also don't make the rules for certification organizations. I also don't think I am an expert. What I am is just a regular guy who listens to his instructor. I am relying on him to give me the tools to make me safe in the water if I listen to everything he tells me. With time and practice and continued training, I hope to be around to talk about it for a long, long time.
I'll take all the beatings my instructor can dish out in training. Why? Because I am human and I am still going to make mistakes. I can only hope that the mistakes I make don't cost me my life and I can learn from it. Diving is serious business and the incidents publicized on this board in just the last 10 days are a testament to that fact.