8. AIS OPERATION
8-7
8.10 Past Position Display (target past position)
This radar can display time-spaced dots (maximum ten dots) that marks the past po-
sitions of any tracked AIS target. You can evaluate actions of a target by the spacing
between dots. Below are examples of dot spacing and target movement.
Target movement and past position display
You can select the number of history dots to display and the time interval to display
the history dots.
1. Press the MENU/ESC key to open the menu.
2. Use the Cursorpad ( or ) to select [Target] and press the ENTER key.
3. Use the Cursorpad ( or ) to select [Past Positions] and press the ENTER key.
Past Positions options
4. Use the Cursorpad ( or ) to select number of past position dots to display (5
or 10) or select [Off] to turn off the past position display.
5. Press the ENTER key.
6. Use the Cursorpad ( or ) to select [Past Posn Interval] and press the ENTER
key.
Past Position Interval options
7. Use the Cursorpad ( or ) to select time interval and press the ENTER key.
8. Press the MENU/ESC key to close the menu.
(a) Ship turning
(b) Ship running
straight
(c) Ship reduced
speed
(d) Ship increased
speed
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