Pontoon Boats, Mounting Transducer Downrod on top of Fence Rail

Pontoon Boats may have areas where flat surface mounting of a baseplate can be used onto the deck.  Typically this area is forward of the Fence. Any level area that has space of 4×4 inch and is flat can use a simple sub plate mounting.

Baseplates sit atop the sub plate using one of two mounting methods.

1. Thumbscrews:  a couple of nylon thumbscrews that act as a quick removal as well as a strain relief should the downrod hit something while deployed.
2. Magnetic Switches:  magnetic switches

Baseplate selection should take into consideration the span, or distance, from the outer edge of the sub plate to the outside rub rail of the boat.  Refer to the drawing below, Dimension D.