The term 'Deviate from the Course' can be summarized by two crossword solutions: 'STRAY' (5 letters) and 'YAW' (3 letters). STRAY means to wander away from a group or a path, while YAW is an aeronautical term that refers to the side-to-side movement of an aircraft. In other words, deviating from the course means to wander away from the intended path or to move in a different direction than originally planned.