Garmin GPSMAP 421/421s Owner's Manual - Page 63
Understanding the Split Frequency Screen, Sonar, Split Frequency, Split Zoom
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Understanding the Split Frequency Screen 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 Sonar > Split Frequency. Depth, temperature, and speed Using Sonar 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. Depth, temperature, and speed Range Frequencies Split Frequency GPSMAP 400/500 Series Owner's Manual Zoomed depth scale Zoom level Transducer frequency Zoom window Range Split Zoom 57
GPSMAP 400/500 Series Owner’s Manual
5´
Using Sonar
Understanding the Split Frequency Screen
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
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