How often are approach plates published electronically?

How often are approach plates published electronically?

• A. Every 14 days
• B. Every 28 days
• C. Every 56 days
• D. Every 90 days

Answer: (B)

Electronic approach plates use a fixed update cadence to keep navigation data current. In the United States, they’re published on a 28-day cycle (the AIRAC cycle). This regular 28-day interval aligns chart updates with navigational data changes, ensuring pilots have the latest instrument procedures without waiting too long or changing too often. The other intervals don’t match standard practice: updating every 14 days would be unnecessarily frequent, while 56 or 90 days could leave procedures outdated and unsafe.

Electronic approach plates use a fixed update cadence to keep navigation data current. In the United States, they’re published on a 28-day cycle (the AIRAC cycle). This regular 28-day interval aligns chart updates with navigational data changes, ensuring pilots have the latest instrument procedures without waiting too long or changing too often. The other intervals don’t match standard practice: updating every 14 days would be unnecessarily frequent, while 56 or 90 days could leave procedures outdated and unsafe.