Which of the following is true regarding the flying of flags and pennants?

Flags and pennants carry specific meanings and protocols that are important for communication and signaling, particularly in maritime contexts. Each flag or pennant represents different messages, status, or commands and must be used according to established conventions. For example, international maritime signal flags have standardized meanings that convey information about the vessel's status, intentions, or any distress signals.

Understanding these meanings is crucial for effective communication at sea, where visual signals may be a primary means of conveying information. Adhering to the appropriate protocols ensures that there is a common understanding among vessels, enhancing safety and coordination.

The other options lack this critical aspect of the usage of flags and pennants. They are not merely for decorative purposes, as their primary function revolves around communication and signaling. Additionally, multiple flags can be flown simultaneously to convey different messages. Finally, there are specific conditions under which flags may or may not be flown, such as during inclement weather or when specific protocols dictate otherwise.