Target Trails; True Or Relative Trails - Furuno FAR-2228-BB Operator's Manual

1. OPERATIONAL OVERVIEW
1.37

Target Trails

The trails of the radar echoes of targets can be displayed in the form of synthetic af-
terglow. Target trails are shown either relative or true and can be sea or ground stabi-
lized. True motion trails require a compass signal, and position and speed data. When
the range is changed, trails are continued for targets which were already displayed in
the previous range. Newly detected targets have no trail when first detected.
1.37.1

True or relative trails

You can display echo trails in true or relative motion. Relative trails show relative
movements between targets and own ship. True motion trails present true target
movements in accordance with their over-the-ground speeds and courses.
True target trails - Stationary
targets are not smeared.
Note: The indication in the [TRAIL MODE] box changes color based on the trail mode
and orientation, as shown in the following table.
Trail mode
True trails
(TRUE-G or TRUE-S)
The reference for the past position displays for AIS and TT is also switched whenever
the trail reference is switched.
1. Open the menu.
2. Select [1 ECHO].
3. Select [0 NEXT].
4. Select [4 TRAILS]. The [TRAILS] menu appears.
Note: You can also right-click the [TRAIL] box to access this menu.
[ TRAIL ] box
1-60
Relative target trails - Targets move relative
to own ship, stationary targets are smeared.
Orientation
HEAD UP (relative)
STERN UP (relative)
CURSOR GYRO (relative)
COURSE UP (relative)
NORTH UP (relative)
Right-click the
[ TRAIL box ] to show
the [ TRAILS ] menu.
Trail mode indication
Trail time
Color
Yellow
White