Here's my Day 4 (full day in the pool).
What an expereince! I learnded that I have a long way to go as far as my skills are concerned!
The day started off with Beto going over buddy skills, communication involving hand signals, lights and even touch signals in low viz condtions. The emphasis of the talk was on buddy skills and the roles if each team member. As he was talking, I could recall the many dives where I've lost contact with buddies, or not been there for someone faster and many more sceneros I've experienced that this system would have prevented.
Once in the pool, it was working on our trim and then buoyancy. Beto put a big steel mirror in the water for us to see what horizontal trim looks and feels like. Then it was onto buoyancy. The advise of getting neutral with a half lung of air and then kicking up or down to maintain the same depth was very helpful.
Then it was onto our kicks. We did each one and was videoed for the evening's shame.
Next was doing the basic 5's (drill involving, removing the primary reg, clipping it off, going to the secondary reg, deploying the long hose, mask clearing and mask removal) while maintaining the same depth. No problem. Then we had to do the drill with our primary light in our hands. Great drill, now I feel so much more comfortable doing things with while holding my light.
I got my back plate readjusted again. My crotch strap was too loose causing the tanks to ride up high and I couldn't extend my head back far enough. Once corrected, my trim was a lot better.
Thru all of this we were just about always in formation maintaining trim and buoyancy (or at least trying to). And giving each other signals to go up or down to maintain the agreed upon depth.
The other thing I really liked is the delination of different roles for a team of 3. Who is running the dive (team leter or #1), who is #2 who helps #1 and #3 who is watchful in case 1 and 2 get task loaded and needs to assist!
I did my first true good buddy dive in the pool in the #2 position. I found it a lot of fun, very easy to keep track of each other, signaling with our lights, etc.