Garmin GPSMAP 2108 - Manual (Page 35)

GPSMAP ® 2008/2108 Owner’s Manual 31
U
sing
s
onar
U
sinG
s
onar
When connected to a transducer, your unit becomes a
powerful fishfinder/flasher. You can connect a Garmin
GSD 21 or GSD 22 sounder module to your unit to
use the sonar features.
NOTE: When using GSD 21, you can wire
through NMEA Port 1 or CANet port whereas
GSD 22 can only wire to CANet (GPSMAP
2008). With GPSMAP 2108, GSD 21 uses
NMEA Port 1 while GSD 22 can only hook to
network port.
Understanding the Full Screen
Select the Full Screen option to view a full-screen
graph of the transducer’s sonar readings.
From the Home screen, select sonar > Full screen .
Transducer
frequency or
beam width
Temperature
Speed
Depth
Range
Suspended
targets
Understanding the Split Freq
Screen
Use the Split Freq screen (dual frequency transducer
only) to view both the 50kHz and 200kHz frequencies
on the same screen. A 50kHz frequency graph appears
on the left; a 200kHz frequency graph appears on the
right.
To open the Split Freq screen, from the Home screen,
select sonar > split Freq .
Frequencies
Depth, temperature, and speed
Range