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Conditions that are above VMC minima but relatively close to one or more of them are sometimes referred to as marginal VMC, and flight in such conditions is referred to as marginal VFR. Summary of United States VMC minima (14 CFR 91.155), providing requirements for minimum visibility and separation from clouds for different airspace ...
In aviation, visual meteorological conditions (VMC) is an aviation flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft.
La OACI, que regula las condiciones meteorológicas del vuelo visual (VMC), que son incompatibles con las condiciones meteorológicas del vuelo instrumental (IMC), define y establece los mínimos internacionales, cuyas pautas se integran mayoritariamente en las regulaciones aéreas de cada país.
In aviation, visual flight rules ( VFR) are a set of regulations under which a pilot operates an aircraft in weather conditions generally clear enough to allow the pilot to see where the aircraft is going. Specifically, the weather must be better than basic VFR weather minima, i.e., in visual meteorological conditions (VMC), as ...
Visual meteorological conditions (VMC) are the meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling equal to or better than specified minima. (ICAO Annex 2: Rules of the Air) VMC are detailed in ICAO Annex 2. Essentially, they are: When above 3,000ft or 1,000ft above terrain, whichever is higher:
Marginal Conditions . Those accidents in VMC prove pilots don’t have to lose all outside visual reference to become disoriented. Spatial disorientation can and does occur in VFR conditions. Haze, darkness, or flying over water can also contribute to a loss of visual reference.
There is also a concept of "marginal VMC", which are certain conditions above VMC minima, which are fairly close to one or more of the VMC minima. With good visibility, pilots can determine the aircraft attitude by utilising visual cues from outside the aircraft, most significantly the horizon .
