Simrad NX45 Specifications Page 91

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Simrad NX40/45 Installation and Operation Manual 91
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).
Select Antenna height then enter
the height of the antenna above sea
level.
19-5 Setup > GPS
> GPS
GPS Source SimNet: Use the GPS source via
SimNet (GPS port)
NMEA: Use the external NMEA 0183
GPS antenna (Fuel/Nav port).
Static
Navigation When the boat stops or moves very
slowly, the calculated GPS speed
and course become erratic. Static
navigation allows the erratic values to
be filtered:
0.01 to 9.99: If the boat speed
is slower than this, the speed is
shown as zero and the course stays
unchanged.
0 (Off): The calculated speed and
course are always used.
Speed and
Course Filter Waves and wind cause the boat
speed and course to fluctuate
slightly. To give stable readings, the
unit calculates these values by taking
several measurements and averaging
them.
A lower value averages
measurements over a shorter period
of time. This gives the most accurate
value but has the most fluctuations.
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