Radar Tuning - Digital Scanners - Raymarine C140w User Reference Handbook

9.7 Radar tuning — DIGITAL scanners
You can use the gain presets and other functions to improve the
quality of the radar picture.
Tuning method Related options
Gain presets For each preset, the
following options are
• Buoy — a special
available:
mode that enhances
the detection of small • Gain — enables you
objects like mooring to use a preset in
buoys. It is useful at fully automatic mode,
ranges up to 0.75nm. or to adjust its gain
manually between 0
• Harbor — this is the
and 100%.
default mode. This
setting takes account • Color Gain— adjusts
the intensity (color) of
of land clutter so that
smaller targets, like displayed targets, but
navigation buoys, are does not significantly
not lost. affect the number of
targets displayed.
• Coastal — accounts
Increasing the
for the slightly higher
color gain causes
levels of sea clutter
more targets to be
you might encounter
displayed in the same
out of harbor and
color, which may help
adjusts the radar
you to determine
display accordingly.
whether an object
is an actual target,
• Offshore —
or just background
automatically adjusts
noise. Reducing
for high levels of sea
the color gain may
clutter.
provide better target
detail and detection.
Using radar
Tuning method
Description
The digital radar
gain presets enable
you to quickly select
pre-configured settings
to achieve the best
picture in different
situations. Raymarine
strongly recommends
the use of these presets
to achieve optimum
results. However, each
of the gain presets can
be manually adjusted
using gain, color gain,
rain, and sea gain
functions.
Related options Description
• Rain — the radar
scanner detects
echoes from rain or
snow. These echoes
appear on screen
as countless small
echoes continuously
changing size,
intensity and position.
Turning the rain
clutter function on
suppresses the bulk
effect of rain returns
from around your
vessel, making it
easier to recognize
other objects.
• Sea Gain — radar
echoes from waves
around your vessel
can clutter the center
of the radar picture,
making it difficult
to detect real targets.
Adjusting the sea gain
reduces this clutter for
up to 5 nautical miles
(depending on wave
and sea conditions)
from your vessel.
• SuperHD Controls
— for SuperHD
scanners only:
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