14. AIS TARGET FUNCTIONS
14.12 How to Display AIS Target Past Positions
The past position display shows equally time-spaced dots marking past positions of
activated AIS targets. A new dot is added at preset time intervals until the preset num-
ber 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.
Past Positions (or the length of trace) and presentation mode can be set on the infor-
mation area, at the locations circled in the illustration below.
a) Ship turning
14.12.1 How to enable/disable the
past position display, set past
position reference
Select the [TT/AIS] page from the [Over-
lay/NAV Tools] box. Click the indications
circled in the figure at right to set the plot
interval (or disable the display) and the
past position bearing reference (true or
relative).
Note: The number of past position points
and points style can be selected on the
[Targets] page. See section 13.7.2.
14.13 How to Display Own Ship Data
You can see own ship's data on the [Own Ship] page in the [NAV Status] menu. Open
the menu then click both [NAV Status] in the [TT/AIS] menu and the [Own Ship] tab.
MMSI:
Name:
Call Sign:
Type:
Description:
14-12
b) Ship running
straight
457804356
Length(LOA):
FURUNO Voyager
Width:
JZ5890312
Ref Bow:
0
All ships of this type
Ref Port:
c) Ship reduced
d) Ship increased
speed
speed
223.2 m
31.8 m
3.3 m
2.8 m
Plot interval,
display ON/OFF
Past position
bearing reference