I recall once when using my vex on open water I simply could not get those buggers to bite. Sent the AquaVu down for a look and those fat red marks were leaves being pushed by an underwater current. They were 6 - 12" off the bottom.
And they would probably show up as nice fish marks on an LED!
Probably so. Even more reason to cough up the $1200 for the Panoptix.