Raymarine C140w, User Reference Handbook, Page: 167 / 222

Menu Item Description Options
Depth Digit Position Position of the digit that
indicates the depth. • Bottom
• Top
Target Depth ID Controls whether the
depth of identified
targets are displayed.
The level of targets
displayed is directly
linked to the level of Fish
Alarm sensitivity. • On
• Off
Depth Lines Controls whether
horizontal lines
indicating depth are
displayed. • On
• Off
Color Palette Various color palettes
are available to suit
different conditions
and your personal
preferences. • Classic Blue
• Classic Black
• Classic White
• Sunburst
• Greyscale
• Inverted Greyscale
• Copper
• Night Vision
Scroll Select AUTO to vary the
scroll speed in relation
to your boat’s speed or
MANUAL to specify the
Scroll Speed. • Manual
• Auto
Menu Item Description Options
Manual Scroll Speed If the Scroll menu item
is set to MANUAL,
specify the percentage
of the normal speed that
screen should scroll at 10 to 100%
Fishfinder preset configuration
Sonar frequency
The frequency of the sonar determines the width of the sonar
beam and the depth to which the signals will penetrate. Each of
the 4 preset operating modes has its own frequency settings. The
frequency setting is indicated in the status bar.
There are 3 available frequency settings:
• 50 kHz produces a wide sonar beam and penetrates the water
well. It provides a lower resolution image that may not be as good
at detecting small fish. Typically use this if you require a large
coverage beneath your boat or if you are in deep water.
• 200 kHz produces narrow beam of quicker shorter sonar waves.
These produce a high resolution image but do not penetrate the
water as well as the lower frequency. This frequency is most
useful in shallower water (up to 1000 ft).
• Auto . When operating in automatic frequency your DSM
automatically selects the appropriate frequency for your depth,
50 kHz in deep water and 200 kHz in shallower water.
Using the fishfinder
167