Furuno CH-250 - Manual (Page 98)

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5.4.5 Track range settings
You may choose the video plotter display scale range as follows.
1. Choose RANGE-TRACK at the SYS menu and then press ►.
5 : 8000
2 : 1000
3 : 2000
4 : 4000
: SELECT : CHANGE MENU: END
** RANGE-TRACK MODE **
1 : 500 (100-10000m)
DEFAULT SETTING : NO YES
Figure 5-16 Range-track mode menu
2. Press ▲ or ▼ to choose range number desired.
3. Press ◄ or ► to set.
4. Press the [MENU] key to register settings and close the menu.