When should aircrew file DD Form 1801 flight plans?

Filing DD Form 1801 flight plans is crucial for the safety and coordination of military flight operations. The correct timing for filing these plans is essential to ensure that all necessary preparations and notifications are completed before takeoff.

Filing no later than 1 hour and 15 minutes before takeoff allows adequate time for air traffic control and other relevant authorities to process the flight plan. This timeframe ensures that any necessary adjustments can be made in advance, enhancing safety and efficiency. It allows flight personnel to confirm that all required information is accurately registered and that there is sufficient time for any potential changes to be addressed.

The other options may suggest filing too early or too late, which could lead to complications or miscommunications regarding flight scheduling and airspace management. Hence, the selection of no later than 1 hour and 15 minutes before takeoff as the appropriate time reflects a balance of operational readiness and procedural compliance, ensuring that the mission can proceed smoothly and safely.