Final answer:
When using WAAS avionics at the alternate airport, there are restrictions to flight planning. The airport must be WAAS-capable, the aircraft must stay within the WAAS coverage area, and pilots should follow regulations.
Step-by-step explanation:
When using WAAS avionics at the alternate airport, there are a few restrictions that apply to flight planning. Firstly, the alternate airport must be WAAS-capable, meaning it has the necessary infrastructure to support WAAS approaches. Secondly, the pilot must plan the flight in such a way that ensures the aircraft will remain within the WAAS coverage area throughout the approach and landing. Finally, it is important to remember that although WAAS avionics enhance the accuracy and integrity of navigation signals, pilots should still adhere to all applicable regulations and procedures for safe flight operations.