What should be done for headings until a fix?

The correct approach for handling headings until a fix is to record them in both the 4th line and verbally. This procedure ensures that there is a clear and unambiguous record of the headings being used while navigating. By documenting the headings both visually in the 4th line of the operational display and verbalizing them, it helps to prevent misunderstandings and enhances communication among the crew. This dual method of confirmation ensures that everyone involved is aware of the current heading being followed, enabling effective navigation, especially in situations where situational awareness is critical or when deviations from the planned course may need to be addressed.

The other methods do not provide the same level of clarity and assurance. Relying solely on careful verbal confirmation may lead to miscommunication or errors, especially in high-stress environments. Simply recording them if deviations occur does not account for the necessity of maintaining situational awareness during normal operations. Lastly, not addressing them at all could lead to significant navigational errors, as current headings are crucial for safe and effective navigation. Therefore, the best practice is to ensure that headings are consistently recorded both in writing and spoken form.