bde1222, I've been looking for the master schedule for swim waves too. I know I'm in wave 6 (at "6:00am") but don't know if wave 6 actually is supposed to start at 6:20am, or what. I suppose the organizers don't have a definitive time due to the TT start's variability.
I'll see if I can get any specific information on how they plan to execute the TT start and post later today.
I was just down at the race site by the river and bumped into the swim coordinator. He said to jump in, don't dive, because the depth is about 6 feet where the dock is. It sounds like there will just be people entering the water almost continuously so hop in and move it!
He also indicated that they were definitely considering the same type of start for Nations depending on how it works for DC Tri.