Unless required for content completeness, an ATIS message should not exceed the optimum duration of ___.

• A. 15 seconds
• B. 30 seconds
• C. 45 seconds
• D. 60 seconds

Answer: (B)

ATIS broadcasts are meant to provide pilots with current, essential information without tying up the frequency for long periods. The optimum duration is about 30 seconds because it’s long enough to convey the key items—weather, winds, altimeter, active runway, and any pertinent NOTAMs—yet short enough to fit into a rapid update cycle. If the message is too short, important details may be omitted or rushed. If it’s too long, updates take longer to cycle, information can become stale, and pilots have less time to absorb it while taxiing or preparing for departure. A 30-second format achieves a practical balance, allowing timely, repeatable updates that keep everyone informed without overloading the channel.