VFR aircraft arrive and depart using standard arrival and departure routes, while instrument arrival and departure procedures are published for IFR operations.

Each record consists of one piece of navigation information such as an airport, heliport, runway, waypoints, navaids, airways, arrival routes, and departure routes.

Shifting arrivals to La Guardia more to the east "gives us additional departure routes out of the major airports in the Philadelphia and New York metropolitan areas," said Steven Kelley, the administration's manager of airspace redesign.

But the Indian Air Traffic Controllers' Guild issued a statement saying the collision "could have been averted if only there were separate arrival and departure routes at Delhi airport."

Subsequent investigation concluded that the pilots took off without conducting the mandatory pre-flight procedures and used an unauthorised departure route.

It would mean a slightly different departure route--" "Druta's no pilot," Balthasar interjected.

Its residents were too concentrated, its departure routes too congested, its adequate shelters too few.

The leisurely cruise to Pelee Island can range from one-and-a-half to just over two hours depending on departure routes.

The approaches and departure routes to its runways are almost directly overhead the Pentagon.

NextGen is a long-term, multi-billion dollar modernization project that includes replacing ground-based radar with satellite-based surveillance, redesigning aircraft approach and departure routes and replacing outdated aircraft avionics.