Garmin GPSMAP 545s - Manual (Page 57)

GPSMAP 400/500 Series Owner’s Manual 51
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
or beam width
Depth, temperature,
and speed
Range
Zoom
window
Zoomed
depth scale
Zoom level
Split Zoom