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4. Tracked Target (TT) Operation
4-14
4.10 Past Position Display
The past position display shows equally time-spaced dots marking the past positions of any targets being tracked.
If a target changes its speed, the spacing will be uneven. If it changes the course, its plotted course will not be a
straight line. See the illustration below for dot pattern and ship status.
Past position orientation, true or relative, is controlled with TRAIL MODE on the TRAIL menu.
Past position display
4.10.1 Displaying and erasing past position points, choosing past position
plot interval
1. Use the trackball to select the Past Posn indication at the right side of the screen.
SINGLE
SINGLE
AUTO
MAN
AUTO
MAN
xx.xx xx.xxxx.xx xx.xx
Past Posn indication
2. Do one of the following to select a vector time.
Control Available setting
Scrollwheel 1, 2, 3, 5, 6, 10, 12, 15, 20, 30, 40, 50, 60 min
The vector tip shows an estimated position of the target after the selected vector time elapses. It can be valuable to
extend the vector length to evaluate the risk of collision with any target.