Furuno FCR-28x9 Manual De Usuario

2.  RADAR, CHART RADAR OPERATION

White noise may show itself on the screen as random "speckles" spread over the en-
tire radar image. You can remove this noise as follows:

1. Open the menu then select the [1 ECHO] and [1 CUSTOMIZE ECHO] menus to 

show the [CUSTOMIZE ECHO] menu.

2. Select [4 NOISE REJECT].
3. Select [OFF] or [ON] as appropriate.
4. Close the menu.
The status of the noise rejector is indicated at the top-left position, [NR: ON] or [NR: 
OFF].