What should you do when instructed by ATC to "proceed on course"?

When ATC instructs you to "proceed on course," it means you should maintain your current flight path and continue in the direction you are already heading. This directive is often given to ensure that you remain on your planned route, which is critical for maintaining safe separation from other aircraft and adhering to air traffic control protocols. Continuing straight on your current path helps manage airspace efficiently and supports the overall flow of traffic in the vicinity.

While the other options present actions that might be relevant in different contexts, they do not align with the instruction to "proceed on course," which specifically calls for maintaining your existing course rather than making significant changes such as turning, climbing, or preparing for landing. Each of these alternatives could potentially disrupt air traffic management and safety.