In all honesty, I can't really blame the sternwheeler as much as myself. I knew that shallow area was there but, as I've found in the past when you have your head up your butt you tend to get tunnel vision. I was watching the sternwheeler as it over took us and wasn't paying enough attention to where I was. It's called "situational awareness" and I just didn't pay enough attention to that.
How did we get the props off? Here's a link
to a thread I had started that explained it.
Now I should admit that when I have a problem I can't see to find a solution to it causes me to lose sleep. The bigger the problem the more loss of sleep. I was concerned about how to tie the ladder so we could adjust its height below the boat so the diver could sit or stand on it (he chose to stand) and also how to tie it so if he stepped with all his weight (and the weight of the prop) on one side, that side wouldn't just flip him over and he would end up on the bottom.
I woke up at 0400 the morning before we were putting them on with the solution on how to tie the lines to the ladder so that the tipping and height problems would be solved. It always amazes me how solutions to things that are bugging me seem to come to me in my sleep.