What is the difference between 'course' and 'track'?
Short answer
Course is a specified intended or steered direction; track is the actual path made over the ground
Course needs a qualifier—desired, to steer or steered—while track is the path actually made over the ground. Tide, current, leeway and steering can create a difference, so a passage update should label both quantity and reference. Revise this in Directions and Movement.
Quick check
What is the difference between 'course' and 'track'?