ENR 1.3 Instrument flight rules

What are the IFR instrument flight rules?

Instrument flight rules (IFR) is one of two sets of regulations governing all aspects of civil aviation aircraft operations; the other is visual flight rules (VFR).
Instrument flight rules are rules and regulations to govern flight under conditions in which flight by outside visual reference is not safe.

What are the IFR minimums for ICAO?

ICAO specify minimum vertical separation for IFR flight as 1000 ft (300 m) below FL290 and 2000 ft (600 m) above FL290, except where Reduced Vertical Separation Minima (RVSM) apply.
Most national authorities follow a similar rule, but may specify a different level at which the rule changes.

What are the instrument flight rules for landing?

In the instrument flying rules, pilots can descend at a particular altitude above ground level and at a certain distance from the landing airport.
The descending altitude and distance depend on the infrastructure available at the landing area, including landing instruments and artificial light on runways.

In aviation, instrument meteorological conditions (IMC) are weather conditions that require pilots to fly primarily by reference to flight instruments, and therefore under instrument flight rules (IFR), as opposed to flying by outside visual references under visual flight rules (VFR).