your preferred position; for example,
facing the bow.
Select Park position then enter the
angle of the new park position.
Note: You may need to try a few
different park positions to find the
correct one. The strength of the wind
will also affect the park position.
Zero bearing Use the zero bearing alignment to
rotate the radar image, one degree at
a time, so that a known object dead
ahead is directly under the boat’s
heading marker.
This means that the radar image is
aligned with the shown chart and
the compass. An accurate bearing
alignment is particularly important
when the radar image is overlaid onto
the chart.
Adjust this on a chart window with
the radar overlay on.
Select Zero bearing then use the
cursor to enter the new bearing
angle.
Zero range The zero range is also known as the
radar range offset and as the trigger
delay.
If your radar window shows a blank,
black circle around the center or a
solid circle of color at the center, you
need to adjust the zero range setting
until this circle disappears or almost
disappears. Ideally, the radar sweep
should start at your boat (a radar
range of zero).
To adjust the zero range setting:
Position your boat about 45 to 90 m (50 to 100 •
yards) away from and parallel to a straight-walled
jetty or similar feature.
Adjust the gain setting if necessary, so that a •
reasonably good image of the jetty echo is shown on
the radar window. At this stage, the jetty echo may
appear to be bent.
Select Zero range then use the arrow keys to adjust •
the zero range setting until the jetty echo appears as
a straight line on the radar window.
Antenna height The Installation Manual for your
Simrad radar explains how to find
the optimum height for your radar
scanner (antenna).
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