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46 GPSMAP 400/500 Series Owner’s Manual
Using Sonar
Understanding the Split Frequency Screen
Use the Split Frequency screen (dual-frequency transducer only) to
view both the 50 kHz and 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 Sonar > Split Frequency.
Depth, temperature, and speed
Range
Frequencies
Split Frequency
Understanding The Split Zoom Screen
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 Sonar > Split Zoom.
Transducer frequency
Depth, temperature,
and speed
Range
Zoom
window
Zoomed
depth scale
Zoom level
Split Zoom
52


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