Garmin GPSMAP 3205 - Manual (Page 82)

GPSMAP 3205 Owner’s Manual
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Sonar Page
The Sonar Page is where your GPSMAP 3205 becomes a powerful fishfinder/
flasher. If a GSD 21 or a GSD 22 Sounder Module is not attached, the Sonar
Page appears only when the GPSMAP 3205 is in Simulator Mode or if the Sonar
check box is selected on the System tab.
To view the Sonar Page:
Press PAGE repeatedly until the Sonar Page appears.
The sonar function window contains a right-to-left moving sonar image of the
water beneath your boat. Items appear as they pass under the transducer. The most
recent data is shown on the right side of the screen. The right side of the screen
contains a scale reflecting the depth of the area being shown. The top left corner
shows the depth, water temperature, and speed through water (if equipped with a
temperature or speed sensor).
The sonar returns show as red (strongest), orange (strong), yellow (medium), green
(weaker), and blue (weakest). Use the Fish Symbols option to view the actual
sonar data, fish symbols, or a combination of both. Fish symbols appear as red.
When the unit is set to Dual Frequency, the appearance of the fish symbols
changes. Fish symbols from the center of the beam (200kHz) are solid (or narrow
arches), but the returns from the edges of the beam (50kHz) are hollow (or wide
arches).
You can set the sonar display to show a split screen view of a zoomed portion
of the sonar, split frequencies, bottom lock (display scaled from the bottom up)
or a combination of these options. For example, you can choose to show dual
frequency at a 2X zoom (Dual 2X) on one half and normal range dual frequency
(Dual) returns on the other half. The display mode appears at the bottom of each
sonar display.
Sonar Page with Split Screen