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4. AIS OPERATION
4-13
4.9.2 Past position points
You may select the number of past position points to show per plot interval as
follows:
1. Left-click the MENU box to open the menu.
2. Select 4 [TT/AIS] to open the TT
.
AIS menu.
3. Select 5 [TT/AIS SYMBOL].
[TT
.
AIS SYMBOL]
1BACK
2TT
.
AIS SYMBOL COLOR
RED*/GRN/BLU/YEL*/
CYA/MAG/WHT
3 AIS ROT TAG LIMIT
000.0
˚
/MIN
4 TT PAST POSN POINTS
5/10
5 AIS PAST POSN POINTS
5/10
6 AIS SCALED SYMBOL
OFF/ON
* Not available on IMO type
AIS SYMBOL menu
4. Select 5 AIS PAST POSN POINTS.
5. Select 5 or 10 as appropriate.
6. Push the right button three times to close the menu.
4.9.3 Past position display motion
The past position display may be shown in true or relative motion. Open the
TRAIL menu and set TRAIL MODE to TRUE or RELATIVE as appropriate.
4.9.4 Stabilization in true motion
The true motion past position display may be ground stabilized or sea stabilized.
The PAST POSN box shows current stabilization as TRUE-G or TRUE-S. To
change the stabilization mode, open the SPEED menu and set SHIP SPEED to
BT (ground stabilization) or WT (sea stabilization).