There are several chart rotation modes: North Up, East Up, South Up, West Up, Magnetic North Up, Course Up and Heading Up.
North Up - The default rotation mode where north is pointing up.
East Up - Rotation mode where east is pointing up (NavCruiser PRO only)
South Up - Rotation mode where south is pointing up (NavCruiser PRO only)
West Up - Rotation mode where west is pointing up (NavCruiser PRO only)
Magnetic North Up - Rotation mode where magnetic north is pointing up.
Course Up - Rotation mode where the chart is rotated so that the vessels course is pointing up.
Heading Up - Rotation mode where the chart is rotated so that the vessels heading is pointing up.
The rotation mode can be changed from the main menu under "View->Rotation Mode". This menu item works on the last used chart view. See split screen for more information. The rotation mode can also be changed from the chart context menu under "Rotation Mode".