Class C is used for all controlled airspace.

They don't need flight plans if it's out of controlled airspace.

In this area of rural Arkansas there was no controlled airspace below 18,000 feet (5,486 m).

The solution, the safety board suggested, is to expand the controlled airspace to include the main approaches to Midway.

Tower Control controls aircraft on the runway and in the controlled airspace immediately surrounding the airport.

This meant they were within controlled airspace but nowhere near a control tower, flying on visual flight rules.

Repeat, you are about to enter controlled airspace over a municipal area.

He also successfully fought to minimise the amount of controlled airspace.

But we'll have to be careful of flying into controlled airspace.

Misuse through ignorance can result in your getting lost, flying into controlled airspace, and putting other aircraft at risk.