Instrument Meteorological Conditions

Meteorological conditions less than the minima specified in Subpart 602 of the Canadian Aviation Regulations (CARs) for visual meteorological conditions (VMC), expressed in terms of visibility and distance from cloud.

Glossary: Area Minimum Altitude [AMA]
The lowest altitude that may be used under instrument meteorological conditions (IMC) that will provide a minimum vertical clearance of 1000 ft or, in a designated mountainous region, 2000 ft, rounded up to the next 100-ft increment, under conditions of standard temperature and pressure, above all obstacles located in the area specified.
Glossary: Safe Altitude 100 NM
The lowest altitude that may be used under instrument meteorological conditions (IMC) that will provide a minimum vertical clearance of 1,000 ft or, in a designated mountainous region, 1,500 or 2,000 ft, as appropriate, rounded up to the next 100-ft increment, under conditions of standard temperature and pressure, above all obstacles located in an area contained within a radius of 100 NM of the aerodrome geometric centre.