You will see this information at or on the Race Committee course board:
Red or Green plaque located on the stern of the committee boat will indicate port or starboard mark rounding.
Course board is read top to bottom per column:
Top Box Course (Class / Start) Number
Second Box Compass Heading to First Mark
Third Box Course Symbol
Fourth Box Number of laps or partial laps
The Race Committee may change the leeward mark to a Gate Mark for any course.