Garmin Marine GPS System GPSMAP User Manual

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of 132
 
104 GPSMAP
®
6000/7000 Series Owner’s Manual
Sonar
Setting the Color Scheme
You can set the color scheme for all sonar screens.
1. From the Home screen, select
Sonar > Sonar Setup > Appearance.
2. Complete an action:
Select Color Scheme > Blue.
Select Color Scheme > White.
Adjusting the Gain on the Sonar Screen
You can control the sensitivity of the sonar receiver. To see more detail, increase the gain. If the
screen is cluttered, decrease the gain.
1. From the Home screen, select
Sonar.
2. Select a sonar view.
3. Select
Menu > Gain.
4. Complete an action:
Select Auto to allow the chartplotter to adjust the gain automatically.
Select Up or Down to increase or decrease the gain manually.
5. Select
Done.
Adjusting the Noise Rejection on the Sonar Screen
The Noise Rejection setting appears only when you have manually increased or decreased the gain
setting (page 104).
You can minimize the appearance of weak sonar returns by increasing the noise rejection.
1. From the Home screen, select
Sonar.
2. Select a sonar view.
3. Select
Menu > Noise Reject.
4. Select
Up or Down.
Selecting Frequencies
You can indicate which frequencies appear on the sonar screen when using a dual frequency
transducer. You can show data from a 200 kHz sonar signal, data from a 50 kHz sonar signal, or data
from both signals simultaneously.
1. From the Home screen, select
Sonar.
2. Select a sonar view.
3. Select
Menu > Frequency.
4. Complete an action:
Select 200 kHz to show data from a 200 kHz sonar signal. This is useful mainly for more
shallow, inland waters.
Select 50 kHz to show data from a 50 kHz sonar signal. This is useful mainly for deeper
waters.
Select Dual to show both 200 kHz and 50 kHz data.
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