JRC JMA-3910-4 - Measurement with Trackball

4 – 1
4.1 Measurement with Trackball
Procedures
1. Check the picture of targets on the screen.
2. Use the trackball and bring the cursor mark to a target.
The range and bearing of the target is displayed on the lower left of the screen. The
range is the one from the own ship.
Trackball
90270
Cursor
Target
Own ship
4.0NM
45°
0
180
45.0° R
4.000NM
Cursor
Position
Fig. 4.1