Garmin GPS Receiver Garmin GPS Receiver User Manual

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Using Sonar
GPSMAP 400/500 Series Owner’s Manual 57

Use the Sonar Setup screen to dene and adjust settings universal to all sonar
screens.
From the Home screen, select  > .
—adjust the rate at which the sonar scrolls from right to left
(
™
, , , or ). If using a speed-capable transducer,
select  to have the scroll speed automatically adjust to the water speed of
your boat.
—show or hide the sonar returns near the surface of the water.
Hide surface noise to help reduce clutter.
—quickly reference a specic depth ( or ). To set the
depth of the reference line, select , and then press up or down on the
.
—display a vertical asher along the right side of the screen.
—show or hide depth, water temperature, water speed (if your
transducer is capable), battery voltage, cruising, navigation, and the compass
tape (page 9).
 To display water temperature or water speed, the connected transducer
must be capable of measuring water temperature, water speed, or both. Select
 to display the values.
—customize the display of sh symbols, whiteline, and the sonar
color scheme.
• —set how the sonar interprets suspended targets.
Select to show suspended targets as symbols with background sonar
information.
Select
to show suspended targets as symbols with background sonar
information and target depth information.
Select to show suspended targets as symbols.
Select to show suspended targets as symbols with target depth
information.
• —highlights the strongest signal from the bottom to help identify
the hardness or softness.
◦ (default)—turns off whiteline.
◦ —the most-sensitive setting. Almost all strong returns are
highlighted in white.
◦ —many strong returns are highlighted in white.
◦ —the least-sensitive setting. Only the strongest returns are
highlighted in white.
—select  or . This affects the background on all
sonar screens, but does not change the Temp Log or the Depth Log screen.

To adjust advanced sonar settings, press  while viewing a sonar screen.
—Stops the scrolling of the sonar screen.

1. While viewing a sonar screen, press  > .
2. Use the  to position the pointer over the sh or structure you want
to mark.

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