11.12 Smoothing

In Figure 11-21, the actual ship’s track is shown by a wide hatched arrow and the position being fed from the navigational aid is shown by black dots. If smoothing is selected to “0 (off),” the track shown on the display will be a irregular track plotting (solid line) due to signal variations. To smooth this track, the “Weight Factor” given to new position data compared to previous fixes should be changed.

For instance, number 03 provides a weighting factor of 13/16 for new data and 3/16 for previous data. The higher the smoothing num- ber, the slower the position updating becomes. In the figure below, the track shown by the broken line has a time delay more than the one shown by the dot-dash line, because of higher smoothing rate.

To enter a smoothing rate of 03, for example;

1.Press the [MENU] and [8].

2.Select L/L SMOOTHING.

3.Press the [0] and [3] keys to enter smoothing rate of 3.

4.Press the [ENT] key.

0-6 : Position from navaid

0-6 : Position with smoothing applied

 

16 equal

New Position

 

 

parts

 

 

 

 

 

 

Current Position

 

 

 

 

(3/16)

 

 

Pervious Position

 

 

 

Delay due

 

 

 

 

 

to smoothing

 

SMOOTHING SETTING: 03

 

Track display with no smoothing

 

 

 

 

 

Track display with smoothing of

08

 

 

 

 

 

: Track display with no smoothing

 

 

: Track display with smoothing of

12

 

: Track display with smoothing of

14

Figure 11-22 Smoothing

11-14

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Image 111
Furuno GD-3300, GP-3300 manual Smoothing, 11-14