Instrument Approach Procedure, that is, a procedure allowing the pilot to make an approach to the runway using onboard instruments.
The International Civil Aviation Organisation; the body that regulates civil aviation throughout the world. Among its many functions, it defines standards by which Air Traffic Control services are provided.
An approach carried out by a pilot to land on a runway under the guidance of the Instrument Landing System.
A part of a radio transmission to a pilot that is included only to keep him/her aware of the controller’s intentions during radar vectoring. It requires no control action of the pilot, and therefore of the simulator.
The most common electronic landing aid in use today. It consists of individual components that provide a pilot with high-precision vertical and lateral guidance to a runway.