Commercial aerospace is the highway of the sky. Any commercial flight that operates in national and international aerospace is said to be flying in commercial aerospace. Flights that operate in commercial zones can include anything from live freight to passenger flights, air cargo, and even pleasure flights.
Commercial zones are regulated by the relevant air traffic control operations at various levels. The first level is the air traffic control that regulates aircraft traffic in and out of airports. Once flights leave the jurisdiction of the airport controllers, they are then passed onto national aerospace air traffic controllers who guide them onto pre-designated highways in the sky within the agreed commercial routes. Once aircraft are on those paths, they are then handed over to international and regional air traffic control. The whole operation is seamless and requires great concentration from air traffic controllers who are responsible for stacking aircraft at pre-determined heights to avoid collisions.
Air traffic controllers are also responsible for keeping commercial air traffic within commercial zones and away from private and military aerospace which are no-go areas. Some examples include the area around the White House in the United States, which has repeatedly caught some pilots out as they stray away from the commercial flight path into Washington DC’s Dulles airport and into White House buffer zone.
Put simply, commercial aerospace is the zone of the sky that all commercial flights are allowed to fly into or through when they fly from one destination to another. A pilot cannot simply just take off and fly in any direction he sees fit. Particularly with passenger carrying aircraft, these need to stick to a pre-determined flight plan, although there may be alterations during the flight to skirt around bad weather or to avoid errant air traffic that might have strayed too close for comfort. Commercial aerospace is also subject to fees.