Which element marks the beginning and end of the condition in a NOTAM?

Which element marks the beginning and end of the condition in a NOTAM?

• A. DTG for beginning and end of the condition
• B. ADP locator
• C. Affected facility
• D. Keyword categorizing the subject

Answer: (A)

Timing of a NOTAM’s condition is defined by the Date-Time Group. The DTG provides the exact timestamps that show when the described condition becomes active and when it ceases to be in effect, establishing the validity window that pilots and controllers use to determine applicability during flight planning. The other elements don’t carry timing information: an ADP locator identifies where the data is processed or disseminated, not when the condition starts or ends; the affected facility simply names who or what is impacted; and the keyword categorizes the subject of the NOTAM, not its duration.

Timing of a NOTAM’s condition is defined by the Date-Time Group. The DTG provides the exact timestamps that show when the described condition becomes active and when it ceases to be in effect, establishing the validity window that pilots and controllers use to determine applicability during flight planning. The other elements don’t carry timing information: an ADP locator identifies where the data is processed or disseminated, not when the condition starts or ends; the affected facility simply names who or what is impacted; and the keyword categorizes the subject of the NOTAM, not its duration.