Furuno color video plotter GD1720C - Manual (Page 159)

5. AIS OPERATION
5-8
5.11 Displaying Past Positions of AIS Targets
You can display time-spaced dots (maximum ten dots) marking the past positions of any
AIS 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
AIS past position displays
To turn the AIS past position display on or off:
1. Press the MENU key to display the main menu.
2. Press the SYSTEM CONFIGURATION soft key.
3. Press the GENERAL SETUP soft key.
4. Press the AIS OPTION soft key to show the AIS OPTION menu.
5. Choose HISTORY INTERVAL and then press the EDIT soft key.
HISTORY INTERVAL
▲
{
{
{
{
▼
~ OFF
30 seconds
1 minute
3 minutes
6 minutes
History interval window
6. Operate the Cursor pad to select history interval among 30 sec, 1 min, 3 min and 6 min,
or select OFF to turn off the past position display.
7. Press the ENTER soft key.
8. Press the MENU key to close the menu.