4
Function and Operation
OK
Press [OK] key to save the settings in the menu and return to the main
screen.
Day/Night Mode
Press the Day/Night mode key to switch the day mode and night mode.
MODE
Press [MODE] key to select Relative Mode
（
relative speed + relative angle +
max speed + average speed
）
and True Mode
（
relative speed + relative angle
+ true speed + true Angle
）
.
Relative Mode True Mode
Note
：
The wind grade
（
see Appendix
）
can only be shown in relative mode.
The ship speed and heading can be only shown in true mode.