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Reference targets
Introduction
The system has a build in position calculating device that is based on tracking radar targets.
In the narrow water navigation, the radar is one of the best position sensors. The Reference Target is specially
developed to use the radar as a position sensor. It is required that co-ordinates of all Reference targets which can be
used for above, are included in the reference target.
Reference target symbol when it is displayed on chart display.
The chart containing Reference targets must have at least 8 Reference targets inserted. The radar must acquire
simultaneously at least 2 fixed targets before the position is taken into the calculation. For more information, how to
use reference target for position calculation, see chapter "Using ARPA targets for position calculation"
Reference targets are also used in Gyro error compensation.
For more information to use Reference targets in Gyro error compensation, see chapter "Gyro error correction" on
page 312
Reference target presentation on chart display when Reference target function is activated and ECDIS receives target
information from the radar (target number with letter R).
Reference targets • • • • 275
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