Garrett ACE 150 Owner's Manual page 27

ELIM can also be used to modify the
Notch Discrimination Scale to reject a specific
type of trash while detecting all other metal.
When a trash metal is audibly detected while
hunting, simply push the ELIM button to create
a notch where the Target ID cursor signaled the
presence of the trash. The next time the ACE
250 encounters the same trash item, it will not
produce an audible signal.
• RELICS Mode—Designed to eliminate trash
targets normally associated with relic hunting,
while detecting good targets in the lower
conductivity range, such as lead and brass.
25
Ace 150 • Ace 250