Raymarine L1250D, Owner'S Handbook Manual

Page: 26 / 246

1-10 HD Series Fishfinders
Fishfi
nde
r Opti
ons
Figure 1-3: Typical Fishfinder Display
Fishfinder Options
The fishfinder provides controls to select additional modes:
• Frequency – you can select the transducer frequency, 50 kHz for wide cov-
erage and deep water, 200 kHz for a detailed view, both frequencies simul-
taneously or auto-frequency. The default setting is auto-frequency, which
determines the optimum frequency of operation based on the current
depth.
• Bottom Lock – changes the operating mode to reset the bottom, providing
a bottom-up view: The bottom is used as the reference, with its image flat-
tened. Bottom lock mode is used primarily to filter out the bottom structure
and display fish details only.
D6181-1
ZOOM FREQUENCY BTM.LOCK A-SCOPE
AUTO GCRZFH
50kHz
0
SD
60
20
40
18
22
38
35
36
33
32
36 37
42
ft
Gain
Color gain
Range
Cursor ,
controlled
by trackpad
Auto
Mode
Indicators
Water surface
Frequency
Target Depth ID On
Alarm enabled
Frequency
Power
Zoom
Shallow, Deep
Alarm
Indicators
Fish
Depth markers
Target image (return)
Range
Bottom depth
Target image depth
81213_1.book Page 10 Monday, March 17, 2003 1:14 PM