How To Change The Vector Length (Time); Past Position Display; How To Display Past Position Points And Select The Plotting Interval; How To Select The Number Of Past Position Points To Be Displayed - Furuno FAR-2218-BB Operator's Manual

3.12.2

How to change the vector length (time)

The vector time provides an estimation of the target's vector and can be adjusted as
follows:
Place the cursor on the vector time indication in the [Vector] box, then left-click to cycle
through the following settings.
[6min]
[3min]
The vector tip shows an estimated position of the target after the selected vector time
elapses. It can be valuable to extend the vector length to evaluate the risk of collision
with any target.
3.13

Past Position Display

The past position display shows equally time-spaced dots 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] context menu. To adjust the trail orientation, see section 1.37.1.
3.13.1 How to display past position points and select the plotting in-
terval
Select the [PAST POSN] setting, then left-click to cycle through the following settings.
[OFF] [30sec]
The past positions are displayed in accordance with the selected setting.
3.13.2 How to select the number of past position points to be dis-
played
1. Open the menu.
2. Select [5 TT•AIS].
3. Select [4 TT•AIS SYMBOL].
4. Select [5 TT•AIS PAST POSN POINTS].
5. Select [5] or [10] as appropriate, then press the ADJUST knob.
6. Close the menu.
[10min] [20min]
[5min] [6min]...
[1min] [2min]
OFF
[30min] [45min]
[3min] [6min]
PAST POSN
setting
3. TARGET TRACKING (TT)
[60min] [30sec]
[OFF]...
[1min]
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