What is the correct way to write new altitude information on a manual strip?

Writing new altitude information on a manual strip should be done adjacent within the same space because this method maintains clarity and organization on the strip. This approach allows controllers to see both the old and new information at a glance, reducing the risk of miscommunication or errors that might arise from overwriting or obscuring previous entries. Having both sets of information visible helps in quickly assessing the aircraft's current status and any changes made, providing a clear and immediate reference during traffic management.

Other methods, such as overwriting or writing beneath the old information, could lead to confusion, as important details may become illegible or lost. Using a separate strip for new information, while certainly an option, may complicate the process and increase the likelihood of having to manage multiple strips of paper, which could slow down operations in a busy environment. Keeping the updated information adjacent fosters efficiency and accuracy in air traffic control communications.