Start over with the ID code 'Alpha' when ATIS service is resumed after being off the air for more than how many hours?

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Multiple Choice

Start over with the ID code 'Alpha' when ATIS service is resumed after being off the air for more than how many hours?

Explanation:
ATIS information is broadcast with a letter code (Information Alpha, Bravo, Charlie, and so on) to help pilots know how current the data is. When ATIS has been off-air for a long enough time, the sequence is reset so that the resumed broadcast starts a fresh cycle and pilots aren’t misled by mixing old updates with new conditions. The threshold for this reset is twelve hours, so if the service comes back after more than twelve hours of outage, you start over with Information Alpha. If the outage is shorter than that, you continue the sequence without resetting, preserving continuity of updates.

ATIS information is broadcast with a letter code (Information Alpha, Bravo, Charlie, and so on) to help pilots know how current the data is. When ATIS has been off-air for a long enough time, the sequence is reset so that the resumed broadcast starts a fresh cycle and pilots aren’t misled by mixing old updates with new conditions. The threshold for this reset is twelve hours, so if the service comes back after more than twelve hours of outage, you start over with Information Alpha. If the outage is shorter than that, you continue the sequence without resetting, preserving continuity of updates.

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