A catch-all term for all the folks a pilot might be talking to in controlled airspace (or even outside it). ATC is concerned with keeping aircraft operating under IFR separated, helping pilots spot [..]

A weather advisory indicating a hazard to flight for all aircraft over a given area. For example, when prevailing low ceilings are forecast or observed over a given area an IFR AIRMET is issued. Th [..]

The branch of ATC responsible for separating aircraft as they approach congested areas. They have detailed RADAR and generally deal with more aircraft in closer proximity than their brothers in cen [..]

The detailed description of an instrument approach. These are the rules to safely conduct a given approach presented in a standard format.

A CTAF is used to allow pilots to communicate their intentions and positions to each other while operating at an uncontrolled field (or one that is functioning as an uncontrolled field when the two [..]

DME allows a pilot to determine the airplane's distance from a point on the ground that has a DME station. In and of itself, this is useful, but combined with a VOR, pilots can determine their [..]

FBOs are the nice folks who provide services like fuel, flight planning facilities, phones, access to rental cars, rest rooms, showers, snooze rooms for pilots, and bunches of other useful things. [..]

Traffic advsories.

A set of ground-based information centers that provide information to pilots about weather and other flight conditions. They are separate from ATC, and only deal with fairly slowly developing pheno [..]

The equipment in an ILS that provides vertical (up/down) guidance to a landing aircraft.