Past Position Display; How To Select The Dot Number And Interval Of The Past Position; Past Position Display Mode - Furuno FR-1908V-BB Operator's Manual

2.11

Past Position Display

Equally time-spaced dots shows the past position display marking the past positions
of any targets being tracked.
A new dot is added every minute (or at other preset time intervals) until the preset
number is reached. If a target changes its speed, the spacing will be uneven. If it
changes the course, its plotted course will not be a straight line.
Past position orientation, true or relative, is controlled with [TRAIL MODE] in the
[TRAIL] menu. See section 1.25 for the procedure.
(a) Ship turning
2.11.1

How to select the dot number and interval of the past position

You may select the number of past points to display per plotting interval as follows.
1. Open [MAIN MENU], click [TT
2. Click [PAST POSN].
3. Click [INTERVAL].
4. Click the plot interval desired (0.5 min to 6 min). Click [OFF] to erase all past po-
sition points and deactivate the past position display.
5. Click [POINTS].
6. Click the number of dots to display, 5 or 10.
7. Click outside the menu window to close the menu.
2.11.2

Past position display mode

The display mode for the past position display is the same as that set for the TT vector.
In the true motion mode, the true vector is displayed. See paragraph 2.10.1.
(b) Ship running (c) Ship reduced
straight
.
AIS].
[PAST POSN]
1 BACK
2 INTERVAL
OFF/0.5min/1min/2min/
3min/6min
3 POINTS
5/10
2. TARGET TRACKING (TT)
(d) Ship increased
speed speed
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