Chapter 2 OPERATIONS
2.7 SOFT KEY OPERATION
2-60
Relative Bearing Mode
The video is displayed so that the ship's heading line points to the zenith of the PPI (0°
on range rings).
Since targets are displayed in their directions relative to the ship's heading line, the
operator can view the video in the same field of view as in operating the ship at sea. This
mode is suitable for watching over other ships.
True Bearing Mode
The video is displayed so that the zenith of the PPI (0° on range rings) points to the due
north.
Fixed targets do not flicker and are easily identified on the chart, and the true bearing of
a target can easily be read out.
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