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AIS
10-9
10.8 History Display
The history display shows equally time-spaced dots marking past positions of activated
targets being tracked. A new dot is added at preset time intervals until the preset number is
reached. If a target changes its speed, the spacing will be uneven. If it changes course, its
plotted course will not be a straight line.
Below are sample history displays.
(a) Ship turning
(b) Ship running
straight
(c) Ship reduced
speed
(d) Ship increased
speed
Sample history displays
10.8.1 Turning history display on/off
1. Press the [F2] key to open the AIS(1) menu.
2. Press the [0] key twice to show the AIS(2) menu.
[AIS(2)]
1. [AIS(1)]
2. History
On Off
3. History Points
5 10
4. History Interval
10 30sec 1
2 3 6min
5. Symbol Color
R* Y* G* C
M B W*
6. ROT Tag
000.1 /min
7. Auto Activate
On Off
Range = 000.0nm
8. Lost Target Range
000.0nm
9.
0. [(AIS(3)]
*: Not available on IMO-type radar.
AIS2 menu
3. Press the [2] key (History).
4. Further press the [2] key again to turn the history display on or off as appropriate.
5. Press the [ENTER/SELECT] key.
6. Press the [MENU] key to close the menu.