Garmin GPSMAP 546 - Understanding the Split Frequency Screen; Understanding the Split Zoom Screen

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 ➊ and the 200 kHz ➋ 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  > .
➊ ➋

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  > .
➌
➋
➊
➍
➊
Zoomed depth scale
➋
Zoom window
➌
Range
➍
Zoom level and transducer frequency