tomcat once bubbled...
Part I
i know you are trying to help me. but telling me what the answer is, without providing me with the justification implies one of the following:
Look, if you don't like his answer, ask someone else.
Here is what happened during my advanced nitrox TDI class. This was with a great (by any standard) TDI instructor, the best local non-DIR diver, and an all around great guy whom I really don't want to badmouth.
We did one lecture during which we discussed some stuff. I learned very little. I had read the book and was already familiar with 90% of the material.
In the book it said that being narced and not knowing it is a good thing. If you don't believe me, read the book.
The instructor did debunk this when I brought it up (in all fairness).
Now, I had dived with this instructor a couple of times, and he had seen me dive many many times. He was well aware of my skills.
We did one boat dive. The instructor sent me off with another student and a graduate of one of his adv. nitrox classes, let's call the student Joe and the other guy Kent. I had dived with Kent many times, and our skills were about on par.
During the dive Joe misunderstood the instructions and completely screwd up the dive. If I remember right, he took off reeling and never came back. I had to call Kent's attention to this fact, and we chased him down.
We shot a bag, which I had already done, and I did a gas switch, which I also already knew how to do.
I paid (I think) $400 for this class. The ONLY thing it was good for is getting a card that would get me fills. That's it.
About a year later I took a GUE FUNDAMENTALS class. I learned a mindblowing amount of stuff. I figured out what I was able to do, and what I wasn't able to do. I figured out which skills I still needed to work on. I learned how to deal with a situation that is outside your planned dive. Getting to my valves, getting the backup mask, donating the primary, going to the backup reg etc etc., all these things became second nature.
Yes, I did practice quite a bit for this class. To me, that is part of the preparation, which I had also done for the TDI class. So some of the stuff I learned is due to practicing, and due to a local GUE instructor who was kind enough to do practice dives with me (he wasn't instructor yet back then). I also practiced with other guys who had signed up for the class.
I know that you can always say "well, I"m sure there are good TDI instructors and crappy GUE instructors". Maybe that is possible. Maybe it's even likely. However, your chances of getting excellent instruction are much much higher with GUE.
Just look around you. Out of all the people who've taken GUE and TDI classes, I'm willing to bet that over 90% will say that GUE is far better.