I did Cavern/Intro in October (TDI) in doubles and I just finished TDI Cave a couple of weeks ago. To get ready for Cave, I got, and read, the NSS-CDS Cave Manual, the NAUI Cave 1 Manual, the TDI Manual (definitely NOT worth buying), GUE Cave 1 Manual and NACD Cave Manual. As far as I can remember, NONE of those agencies "permit" thirds at the Cavern or Intro level for a diver in doubles. This leads me to wonder about the following statement:
This seems to say the OP was diving doubles at the Intro level and did his dive on thirds. This just doesn't seem right to me.
Now that I've re-read the post, I also wonder about the following
Did you really mean to write "grab on" instead of "OK" the main line? It's my understanding that one should NEVER "grab on" to the main line (or any other).
Or am I just being nitpicky because I'm missing a cat?