Which of the following lengths is NOT a valid aircraft ID length?

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Multiple Choice

Which of the following lengths is NOT a valid aircraft ID length?

Explanation:
Aircraft identification marks have a maximum length. In practice, these IDs are five to seven characters long in total, including the national prefix, so eight characters would exceed the standard limit and isn’t a valid ID. That’s why five-, six-, and seven-character IDs are acceptable formats, while an eight-character ID would not be allowed by typical registration formats. For example, N12345 (six characters) or N1234AB (seven characters) are valid, but eight characters would go beyond the usual maximum.

Aircraft identification marks have a maximum length. In practice, these IDs are five to seven characters long in total, including the national prefix, so eight characters would exceed the standard limit and isn’t a valid ID. That’s why five-, six-, and seven-character IDs are acceptable formats, while an eight-character ID would not be allowed by typical registration formats. For example, N12345 (six characters) or N1234AB (seven characters) are valid, but eight characters would go beyond the usual maximum.

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