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2. RADAR OPERATION
2-40
2.26.6 Displaying past position (ARP)
This ARP can display time-spaced dots (maximum ten dots) marking the past
positions of any targets being tracked. You can evaluate a target’s actions by the
spacing between dots. Below are examples of dot spacing and target movement.
(a) Ship turning
(b) Ship running
straight
(c) Ship reduced
speed
(d) Ship increased
speed
Past position displays
To turn the past position display on or off:
1. Press the [MENU] key followed by the ARP SETUP soft key.
2. Operate the trackball to select HISTORY INTERVAL.
3. Press the EDIT soft key to show the history interval window.
HISTORY INTERVAL
▲
▼
OFF
30 seconds
1 minute
3 minutes
6 minutes
History interval window
4. Operate the trackball to select history interval among 30 sec, 1 min, 3 min
and 6 min, or select OFF to turn off the past position display.
5. Press the ENTER soft key.
6. Press the [MENU] key to close the menu.