None of these type of discriminating machines seem reliable. The GMT for example will grunt as if iron on certain types/shapes of gold to in particular reefy gold. It can't make it's mind up on some other bits either.
I was always told/taught with the GMT that if the signal is strongly into the gold side then it's pretty well 100% sure to be something non ferrous. If it's strongly into the iron side (or grunting) then it's pretty well 100% sure to be a ferrous object.
If the machine is around the middle or can't make up it's mind you need to dig!
Sounds like the Gold Monster is the same.
How did the ground tracking seem?
I was always told/taught with the GMT that if the signal is strongly into the gold side then it's pretty well 100% sure to be something non ferrous. If it's strongly into the iron side (or grunting) then it's pretty well 100% sure to be a ferrous object.
If the machine is around the middle or can't make up it's mind you need to dig!
Sounds like the Gold Monster is the same.
How did the ground tracking seem?