What is the origin of the idiom "captain of one's own ship" and when to use it?

The origin of the idiom "captain of one's own ship" can be traced back to the concept of maritime navigation and the role of a ship's captain. The idiom draws upon the imagery of a captain being in charge of their vessel, making decisions, and guiding its course. While the exact origin of the idiom is unclear, it aligns with the historical context of seafaring and the importance of a captain's leadership and authority at sea. It is often employed in discussions or situations related to career choices, entrepreneurship, personal development, and decision-making.