Some further thoughts:
Surface interval was clearly a big factor, but it wasn't the only one. This seems like a classic example of a lot of mostly little things going wrong and together creating a serious situation. We were pushing too hard to dive while the wall was in sight, which wasn't long. Our surface intervals were too short, Frank's leaving the water and my spearo background contributed to that. Ted lost track of time in the fasination of a new and beautiful place ( it is really spectacular) and possibly a little bit of unexpected narcosis. I got complacent, lost track of his dive time and did not try to call him back at a minute plus or so. I wasn't ready or alert when he cleared the surface. I hadn't fully practiced ALL safety procedures prior to the days diving(or drilled the other guys). Both of the latter led to poor and slow technique, which could have been serious. It came out ok, the main thing was I was in his face when he bo'ed.
I haven't dove with a watch in years and don't want to, but this kind of diving may demand one. Might as well get a D3. It sure would have been a good safty tool in ths situation.
Thanks all and good diving.
Connor