Garmin 90/140 - Manual (Page 23)

Fishfinder 90/140 Owner’s Manual 17
O
PERATING
Y
OUR
F
ISHFINDER
> U
SING THE
S
ETUP
M
ENU
Fish—turns on or off (default) an alarm that sounds when
the Fishfinder detects what it determines to be a fish.
Graphs
Fish ID—sets how the Fishfinder shows underwater
targets and background information. If you select a
fish symbol, the screen shows only the information
related to that symbol (large, medium, and small sizes).
When using wide beam, fish symbols that are to the
sides of the boat appear hollow. Those that are directly
below the boat appear as solid black fish symbols.
(default) the Fishfinder does not interpret the sonar
return data. Fish appear as arches
Suspended targets appear as symbols. No background
information appears
Same as previous with the target depth shown.
Suspended targets appear as symbols. Background
information appears, making the distinction between fish
and structure easier.
Same as previous with target depth shown.
Beam—controls the angle of the transducer beam. Wide
beam allows you to see more fish in shallow water, even off
the sides of the boat. You can also choose Narrow (default)
beam.
Whiteline—sets how the Fishfinder shows information
about the bottom type.
• Off—the bottom return appears as solid black.
Whiteline Off Whiteline On
• On (default)—the bottom return appears as a
grayscale pattern and can help to determine bottom
hardness. A hard bottom displays a thicker bottom
layer. A soft bottom appears as a thinner bottom layer.