The phrase "went off course" refers to situations where things didn't go according to plan or deviated from the intended path. Some antonyms of this phrase include "stayed on course," "stayed on track," "stuck to the plan," "followed the map," "stayed true to the goal," "maintained the course," and "stayed in line with the objective." These antonyms imply that the person or team involved succeeded in following through with their plan, objective, or route. Staying on course requires discipline, focus, and determination, but it leads to success, achievement, and often greater than expected outcomes.