Final answer:
The number of waypoints in a flight plan can vary depending on the flight management system, with some systems accommodating hundreds of waypoints. Pilots include only necessary waypoints to define the route and comply with Air Traffic Control, considering equipment limitations.
Step-by-step explanation:
The number of waypoints that can be included in a flight plan can vary depending on the system used to file the plan and the complexity of the route.
In many modern flight management systems (FMS), the capacity can be quite large, sometimes allowing for hundreds of waypoints to be programmed. However, for practical purposes, the number of waypoints in a flight plan should be only as many as necessary to define the route accurately and comply with Air Traffic Control requirements.
In general aviation, simpler GPS navigation systems may have limitations with fewer waypoints compared to complex commercial FMS. Always consult the specific equipment’s manual for exact capabilities. For more detailed flight planning or long international flights, pilots might add additional waypoints to ensure they meet regulatory requirements and maintain optimal fuel efficiency.