At 22:55 11/18/96 -0800, you wrote:
>Tim Kerby wrote:
>
>>Multipath should not be too much of a problem if the beam is collimated
>>and the first ping is the one taken count of.

Don't forget the shallow water problem,,, that is the second bounce.  Don't
know how big a problem it'll be for air,,, but a hull in shallow water will
show a second image at twice the distance to the physical bottom.  Yea,,, I
know,,,,  cheap fish finder  ;-)



'Grif' N7IVS