Furuno FR-2105-B - Manual (Page 121)

-4.7-
If own ship track is stored every minute, 6,000 points of memory represents 100 hours of time
span; 3 min intervals covers 16 days and 16 h. The time span covering one other ship is 1/10
of own ship as a total of 10 other ships equal to one OS.
Memory used
Press [NAV MENU] and [0]. Memory used appears as below:
MEMORY IN USE
OWN SHIP = 3456
TARGET = 1124
MARK = 0021
Smoothing
Even when the vessel is sailing in a straight line the track shown on the display looks irregular.
This is due to signal variation of the external navaid. You can compensate for this irregularity
with smoothing.
A smoothing factor between 1 and 9 is available. OFF provides no smoothing. In most cases a
smoothing setting between 1 and 5 is satisfactory.
1. Press [NAV MENU] and [5] in order.
2. Press [8] to select smoothing factor.
3. Press [ENTER].
Erasing Track
In the busy traffic, the screen may become cluttered. You can remove all or a percentage of
own ship wakes from the memory to clear the display. Wakes of other ships can also be
cleared.
1. Press [NAV MENU].
2. Press [9] to display the PLOTTER ERASE menu.
[PLOTTER ERASE]
1 [VIDEO PLOTTER 1]
2 OWN SHIP PLOT
30%/50%/80%/ALL
3 TARGET PLOT 30%/50%/80%/ALL
4 MARK OFF/ALL
5 WPT OFF/ALL
6 NAV LINE OFF/ALL
3. Press [2] several times to select OWN SHIP PLOT and the amount of track points you wish
to erase.
4. Press [ENTER].
5. To erase other ship's track, press [3] to select TARGET PLOT and the amount of track to
erase. To ERASE means an action to remove the relevant data from the memory. Once
removed, the data will not be recalled any more.
6. Press [ENTER].