Radar sector blanking
(Halo Radar only)
You can define up to four sectors on the PPI inside which no radar data is transmitted. This
enables you to blank-out interference caused by features on your boat or from a secondary
radar. The blanking occurs on the main radar image and radar overlay on a chart. An enabled
sector is shown as a magenta outline with 3 arcs crossing the blanking area. To specify radar
sector blanking, refer to the Halo Radar Installation Manual.
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Note: Radar sector blanking is only available for Halo radars.
Main radar PPI Radar overlay on a chart
Adjusting the radar image
You may be able to improve the radar image by adjusting the radar sensitivity, and by
filtering out the random echoes from sea and weather conditions.
The radar control images are located in the upper right corner of the radar panel. You can
adjust the image settings by selecting the radar control image or by pressing the rotary knob.
The selected control expands and displays its name in full and a slide bar is displayed. You
can then adjust the value by turning the rotary know or by using the slide bar.
You can also adjust the image settings from the radar menu.
Radar use modes
(Halo Radar only)
Radar modes are available with default optimal control settings for different environments.
The following modes are available:
• Custom - In this mode all radar controls can be adjusted and will be retained after a mode
change or radar power cycle. Radar defaults are set for general purpose use.
• Harbor - In this mode the radar settings are optimized for areas such as busy waterways
and large man-made structures where good target discrimination and rapid image
updates are needed.
• Offshore - In this mode the radar settings are optimized for offshore sea conditions and
making isolated targets larger and easy to see.
• Weather - In this mode the radar settings are optimized for best detection and
presentation of rain clutter. Image update rate is slowed and color depth is increased.
• Bird - In this mode the radar settings are optimized for best detection of birds. The radar is
set up for maximum sensitivity. This mode is not recommended for use in congested
harbor environments.
Not all controls are adjustable in each mode. The following list shows preset controls and
adjustability for each control.
Range
Custom: Adjustable
Harbor: Full*
Offshore: Full*
Weather: Full*
Bird: Up to 24nm
Threshold
Custom: Adjustable
Harbor: 30%
Offshore: 30%
Weather: 0%
Bird: 0%
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Radar | NSS evo3 Operator Manual
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