visual meteorological conditions Click to see full answer. Similarly one may ask, what is VMC airspeed? Vmc- Minimum Controllable Airspeed FAR 23.149- Vmc is the calibrated airspeed, at which, when the critical engine is suddenly made inoperative it is possible to: 1. Maintain control of the airplane with the engine still inoperative.Furthermore, what does VFR stand for? Visual Flight Rules Also question is, what is the difference between VFR and VMC? Visual flight rules (VFR) are just that, a set of rules adopted by the FAA to govern aircraft flight when the pilot has visual reference. On the other hand, visual meteorological conditions (VMC) are expressed in terms of visibility, distance from clouds, and ceiling meeting or exceeding the minimums specified by VFR.What are IFR conditions?The regulations define weather flight conditions for visual flight rules (VFR) and instrument flight rules (IFR) in terms of specific values for ceiling and visibility. IFR means a ceiling less than 1,000 feet AGL and/or visibility less than three miles. Low IFR (LIFR) is a sub-category of IFR.