Aircraft flying off the airport must have what type of route if they are GNSS capable?

Aircraft that are capable of Global Navigation Satellite System (GNSS) navigation can utilize point-to-point routing. This provides them with the flexibility to navigate directly between two points rather than being restricted to pre-defined published routes. Point-to-point routing allows for efficient flight planning and can accommodate various factors such as airspace availability, weather conditions, and other operational considerations.

Using point-to-point routing, these aircraft can optimize their flight paths, resulting in potential reductions in fuel consumption and improved overall efficiency. While published routes can be beneficial for structure and organization in busy airspace, GNSS-capable aircraft have the technological capability to navigate effectively without being limited to these predefined paths, enabling more dynamic routing options.