What is the origin of the idiom "on course" and when to use it?

The origin of this idiom is not entirely clear, as it is a relatively straightforward expression that likely developed over time as a way to describe someone's progress towards a goal. However, the word "course" has its roots in Middle English, where it referred to a path or direction. Over time, it came to be used more broadly to refer to a sequence of events or a plan of action. The phrase "on course" likely evolved from these earlier meanings of "course" to describe a situation where someone is following a specific plan or strategy and making progress towards their goal. The idiom is used to describe a situation where someone is making steady progress towards achieving their goal.