13
PINPOINTING
Pinpointing your target with the IMPULSE is relatively simple,
but it will take some practice.
1. Make sure your IMPULSE is in tune. (See p. 10,
Tuning, if you need to tune your IMPULSE.)
2. Locate a target and pass the search coil over
it. You should notice three things from your
IMPULSE: 1) The red LED flashes, indicating a
target, 2) The LCD signal-strength bar graph
climbs, peaking when the coil is directly over the
target and 3) an audible tone is heard, increasing
in pitch and volume as the search coil passes
over the target.
Divers can sweep the IMPULSE search coil in a
wide semicircle to methodically cover a large
open area, or probe cracks and crevices with
the search coil using no motion.
SEARCHING
having to move the coil back and forth.
5. Remember, observe all the rules of safe diving.
NOTE:
Your threshold tone will probably go up and down as you
search. This is a perfectly normal response since the distance
between your coil ‘and the bottom varies as you sweep the
coil back and forth. You may want to readjust your threshold
level slightly to maintain a comfortable “average “ threshold
volume. You will also have to readjust it if the ground
mineralization changes sufficiently.
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