Thank you for responding to my request for help mfr02!!
I had not thought about an ESC with both forward and reverse, but I will l look for one. My original thought line was of an electrical way to switch between the two directions, perhaps some type of a switch that could be activated with another servo. Anyway, I am now intrigued by the Springer Tug Boat and shall Google it to see what I can find out about it.
But your astute mention of weeds is what has me concerned to some extent and that is why I came up with this airboat idea......, for now anyway. So time will tell.
And if you have any other ideas too, I would be interested in them also. As the water here is all ice now, I do have a ways to go before spring time float flying, but a winter project is always nice to do too.
Thank you again.
Jim