1-5
Dual
Provides the low frequency picture on the left 1/2 of the screen; the high frequency on the right
1/2.
Frequency
Low
High
Beamwidth
wide
Narrow
Echo trail
Long
Short
0
1/1
0.0
49.6
ft
40
0
20
60
80
LF
0
20
40
60
80
Low
frequency
High
frequency
HF
Dual frequency display
