Select > Settings > Preferences.

Language

Sets the interface language.

Units

Sets the units of measure used in the user interface.

VHF Channel Designation

Labels simplex variants of duplex channels with a prefix (10 or 20) or a suffix (A or B).

Bearings

Sets the north reference for displaying bearings (the direction from your vessel to something else, such as an AIS target).

Headings

Sets the north reference for displaying headings (the direction the bow points toward).

COGs

Sets the north reference for displaying course over ground (the vessel's actual direction of travel).

Position Format

Sets the format for displaying GPS coordinates.