The DI fan beam will rotate on the axis of the pole....
As target echos fall into the beam (as it is rotated)...that echo data will enter the DI image at the far right of the display and continue left into the display history...
No echo target location will be known except for....the target was in the fan beam at the orientation that the xducer was positioned at the instant that echo data entered the DI image display right edge...
Now if you mount that xducer at an angle facing away...such that the DI fan beam provides a "sweep" of the area it is "pointing" at...you will, in effect create the same DI images Vic n gets with his HB 345 DI...
I say try it...and post pix...this could be very interesting...
Rickie