Visual Meteorological Conditions (VMC)
Visual Meteorological Conditions (VMC) are meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling equal to or better than specified minima. VMC defines the threshold at which VFR flight is permitted; conditions below VMC are instrument meteorological conditions (IMC).
VMC Minima by Airspace
- Class A: VMC not applicable — IFR only
- Class B (12,500–18,000 ft): 3 SM; 500 ft below, 1,000 ft above, 1 SM horizontally from cloud
- Class C/D (controlled below 10,000 ft): Ceiling ≥ 1,000 ft, visibility ≥ 3 SM; 500 ft below, 1,000 ft above, 2,000 ft horizontal from cloud
- Class G at/above 1,000 ft AGL (below 10,000 ft): 1 SM, clear of cloud
- Class G below 1,000 ft AGL: 2 SM, 500 ft below, 1,000 ft above, 2,000 ft horizontal
VMC vs. SVFR vs. IMC
VMC allows full VFR operations. SVFR (Special VFR) allows operations in a control zone with reduced minimums by ATC authorization. IMC (below VMC minima) requires IFR.
Related Terms
See also: VFR, IMC, Special VFR.
