Lowrance electronic LCX-17M - Manual (Page 79)

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Figures 1A and 2A (left) show Sonar Page in normal chart mode. Figures
1B and 2B (right) show the same underwater scene with Fish I.D. turned
on. Note how arches are replaced with symbols.
FishTrack

The FishTrack feature shows the depth of a fish symbol when it
appears on the display. This lets you accurately gauge the depth of
targets. This feature is available only when the Fish I.D. feature is on.
The default setting for FishTrack is off.
To turn on FishTrack:
(Note: These instructions will turn on FishTrack and Fish I.D. at the
same time.)
1. From the Sonar Page, press MENU |
↓ to
S ONAR F EATURES
| ENT.
2. Press
↓ to
F
ISH
D
EPTHS
| ENT | EXIT | EXIT .
To turn off FishTrack, repeat the instructions in step 1. Turning off
FishTrack in this manner will not turn off Fish I.D. symbols.
Fish arches
above structure
No fish shown
Fig. 1 A Fig. 1 B
Fig. 2 A Fig. 2 B
Many fish
arches visible
Fewer fish
symbols visible
Fish symbols appear
in surface clutter