How are frequently used words and phrases in pilot/controller communications printed in the .65?

The correct answer highlights that frequently used words and phrases in pilot/controller communications are printed in bold italics in the .65 document. This formatting choice serves a key purpose: it visually emphasizes these terms to facilitate quick recognition and understanding. In the high-pressure environment of aviation, clarity and speed in communication are essential. By using bold italics, the publication ensures that pilots and controllers can swiftly identify critical instructions and phrases, thereby enhancing the efficiency and safety of air traffic communication.

Other formatting styles like just bold or just italics do not offer the same level of distinctiveness as bold italics. Regular font would lack the necessary emphasis to catch the eye during critical interactions, thus reducing the effectiveness of communication.