tod--do not know if you got phone setup yet--
this perhps not so much for you but then you
consider..there is at least one out there wants
to do from scratch--well here you are..this is
called a sector scan and produces a slice of pie
type scan for the one dimention and the movement
of the fish is the other..the basic principls
involved should be apparent...this is not thery
but the tecqniqe was/is used in medical usound
imaging....it should be possible to steer the beam
in the other plane also to have a device that
produces a psedo-realtime image...
but a word of warning--thge design of the electronics
in such an apparatus is far from mundane---not
somthn' you can do from radio shack parts (totally)
this is not to discorage---simply to state truth.
reg-rick
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