Garmin GPSMAP 235 Sounder - Manual (Page 34)

A. The right side of the screen represents the trans-
ducer’s location on your boat. Items appearing
on the right side of the screen were passed by
more recently than those on the left.
B. The four-level gray LCD screen makes it possible
to easily separate sonar targets from their
surroundings.
A B
Sounder Page
The Sounder Page is where your GPSMAP 235 becomes a powerful fishfinder.
The top of the screen can display a maximum of seven selectable data field
options, while the middle of the page displays a right-to-left moving sonar image
of the water beneath your boat. (Note: Items appear as they pass under your
transducer.) Fish are displayed as a darkened arch or a fish symbol in three differ-
ent sizes. Thermoclines are shown as shades of gray.
The area of strongest sonar return (or “whiteline”) is displayed as a light gray
band below the black line. Typically, the bottom will be the primary whiteline. A
thin whiteline indicates a soft bottom while a thick whiteline shows a harder bot-
tom. A black line is used to show the point were the water meets the whiteline.
The black line follows the contour of the bottom and shows objects of reasonable
size. Along the right side of the screen is an adjustable scale which reflects the
depth of the area being displayed. The status bar at the bottom of the page dis-
plays satellite signal status, digital depth, operating frequencies (single or dual
mode), and any triggered alarms. It also shows the zoom level when the sounder
is in the zoom mode.
24
SECTION
3
SOUNDER PAGE
Overview
Data Field
Whiteline
Thermocline
Status Bar
Fish Icon
Range Mode
Black Line
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