Here's a few screenshots of a SketchUp model of the Damit Janet V which I will be using in a forthcoming book. Just for chuckles. "Archaeological Salvage in the Coastal Zone", or something like that.
Whites Surfmaster PI Pro and Whites Surfmaster PI, Minelab Excal NY blue sword. 2 White's Dual field pi, Garrett sea hunter pi II (but don't use it for obvious reasons) 5' x 3 1/2' coil underwater Pi
I honestly don't know how much of a difference that would make. Those screws are close enough to push all that thrust right down the tubes. It helps that they are angled just a bit. It is an impressive dig boat for sure.
With the Props outside of the Tube it seems that you would not have as much trouble with a cavitation bubble building up !
Not that it would really matter .
I've never seen the boat out of the water, so I was just winging it, purely using my own imagination. I had to use some moper dopery to make it a feasible stepped stern. But it is one hell of a boat! I'd love to give it a good dig!
The Damit Janet V is great for digging but so top heavy due to the top deck it will make you hold your breath during rough seas wondering if it's gonna go over. Shame it doesn't do much work.
It pains me to report that the Damit Janet IV has been purchased by an Anguillan gentleman and will be leaving US waters in the next few days, destined to be a longline fishing boat.