How often are NOTAMs published?

NOTAMs, or Notices to Airmen, are essential for providing crucial information about the status of airports, airspace, and flight operations that may affect flight safety. The automatic update cycle for NOTAMs is set based on the necessity to keep pilots informed of any relevant changes or temporary conditions that may arise.

The correct answer indicates that NOTAMs are published every 28 days. This timeframe ensures that critical information remains current and accessible to pilots, who must remain aware of any changes in their flight environment. The 28-day cycle is consistent with the requirement for periodic updates to ensure safety and compliance with regulations, as well as to accommodate any changes in NOTAM information that would be relevant to flight operations.

In contrast, the incorrect options suggest different, less frequent cycles which do not align with the regulations governing the timely dissemination of NOTAMs. Keeping NOTAMs updated every 28 days strikes a balance between keeping information relevant and manageable for publication, crucial for maintaining aviation safety standards.