Which statement about collective call signs is true?

• A. They refer to more than one person/unit
• B. They refer to a single person
• C. They are used only in practice drills
• D. They require encryption

Answer: (A)

Collective call signs are used to address a group rather than a single person. This lets one radio call reach all members of a unit or formation at once, which makes communication faster and reduces radio traffic. That’s why the statement that they refer to more than one person or unit is the right one. They aren’t limited to practice drills and are used in real operations when coordinating multiple people or aircraft. Encryption isn’t a defining feature of collective call signs—whether encryption is used depends on security requirements, not on the call sign type.