If you take a look at this photos there is an eye let and an open run threw on the bow. I'm thinking it was anchored from the bow by hooking a line on the ring and running the anchor line through the hole on the front. to keep the float swinging an anchor can be dropped down the hatch opening...
I like your theory but I am not sure this is why he put that in there. On the real plans the opening is much bigger to except a small HP Motor. I don't see the benefit of trying to scull this float that way. Im thinking they put that in there as it was in the plans. Maybe he used it as a way to...
Keith This Float is known ay a Great Bay Scull. The scull originally was Designed by James Whitney. I have the planes for this design. The roomer has it that the original boat that was lofted had a full schooner stern but the plans were changed and the hollow stern was put in and the motor well...