Precision approach procedure

Nonprecision approach procedure - 14 CFR 1.1
Nonprecision approach procedure means a standard instrument approach procedure in which no electronic glide slope is provided.

Precision Approach Procedure - A standard instrument approach procedure in which an electronic glideslope/glidepath is provided (e.g., Instrument Landing System and Precision Approach Radar).

(See NONPRECISION APPROACH PROCEDURE.)
MINIMUM EN ROUTE IFR ALTITUDE- The lowest published altitude between radio fixes which assures acceptable navigational signal coverage and meets obstacle clearance requirements between those fixes.

There are three basic types of instrument approach procedures: departure procedures, non-precision approach procedures (which generally get a pilot within 500 feet of the runway surface in horizontal visibilities of one mile or greater), ...

There is a conflict of procedures in the use of step-down non-precision approach procedures and the advent of new technology that allows a descent profile to be flown.

See also: Flight, Aircraft, Navigation, Airport, Landing