Fisher Impulse
This
is the newest to our arsenal of detectors. I've used the Fisher Impulse in
fresh water and it does really good. However, it doesn't perform well on the
beach, it has to be in water. It has a 10 inch coil and it is wickedly hard
to use. You need "three hands" to operate this detector.
I use it mostly in salt water and it seemed to do okay, as long as I have the unit on a strap hanging around my neck. For some reason, the further the unit is away from the salt water, the better it works. You need to stay in the same level of water, sort of walking in a straight line at the same depth or your continually having to tweak it.
The Fisher Impulse uses 8 AA batteries and they last an incredibly long time. This is not a detector I would recommend for a beginner. I gave it to my wife to try out once, and she gave it back to me.
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