Furuno FAR-2107(-BB) - Manual (Page 69)

1. RADAR OPERATION
1-47
1.30 Target Trails
The trails of the radar echoes of targets may be
displayed in the form of synthetic afterglow.
Target trails are shown either relative or true
and may be sea or ground stabilized. True
motion trails require a compass signal, and
position and speed data.
1.30.1 True or relative trails
You may 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.
Note: When true trail is selected on the RM
mode, the TRAIL MODE box is shown in
blue. The reference for the past position
displays for AIS and TT is also switched
whenever trail reference is switched.
1. Right-click the TRAIL MODE box at the bottom right corner of the screen to
open the TRAIL menu.
* 1 Shown when 8 TRAIL LENGTH
is selected to other than "NORMAL".
Other than IMO and A types.
W-type does not show 48H.
* 2 B and C types only
[TRAIL MENU]
1 TRAIL MODE
REL/TRUE
2 TRAIL GRAD
SINGLE/MULTI
3 NARROW TRAIL* 3
OFF/1/2
4 TRAIL LEVEL
1/2/3/4
5 TRAIL RESTART
OFF/ON
6 TRAIL COPY
OFF/ON
7 OS TRAIL
OFF/1/2
8 TRAIL LENGTH* 1
NORMAL/12H/24H/48H
9 TRAIL HIDE* 1
START 00:00
END
00:00
0 [TRAIL COLOR]* 1 ,* 2
* 3 B, C and W types
2. Select 1 TRAIL MODE.
3. Select TRUE or REL.
4. Push the right button to close the menu.
(a) True target trails
(No smearing of
stationary targets)
(b) Relative target trails
(Targets moving relative
to own ship)