Instrument Approach Operations [ICAO]

An approach and landing using instruments for navigation guidance based on an instrument approach procedure. There are two methods for executing instrument approach operations:
  1. A two-dimensional (2D) instrument approach operation, using lateral navigation guidance only; and
  2. A three-dimensional (3D) instrument approach operation, using both lateral and vertical navigation guidance.

    Note: Lateral and vertical navigation guidance refers to the guidance provided either by:

    1. a ground-based radio navigation aid; or
    2. computer-generated navigation data from ground-based, space-based, self-contained navigation aids or a combination of these.

Source: Pilot Contoller Glossary (PCG)

See also: