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Using Sonar
GPSMAP 400/500 Series Owner’s Manual 55

Use the Split Frequency screen (dual-frequency transducer only) to view both
the 50 kHz
and the 200 kHz
frequencies on the same screen. A 50 kHz
frequency graph appears on the left. A 200 kHz frequency graph appears on the
right.
From the Home screen, select  > .

Use the Split Zoom screen to view the full sonar data from the graph and a
zoomed in portion on the same screen.
From the Home screen, select  > .
Zoomed depth scale
Zoom window
Range
Zoom level and transducer frequency
61


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