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In aviation, visual flight rules (VFR) ... by requesting SVFR, asserts that they can do so despite the marginal conditions. For departing flights, the pilot must be ...
VFR / VMC visibility requirements in the US. 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.
In aviation, 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). The U.S. Federal Aviation Administration 's (FAA) Instrument Flying Handbook defines IFR as: "Rules and regulations established by the FAA to govern flight under ...
A pilot's view of the runway just before landing in thick fog at night. 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).
Flight under SVFR is only allowed in controlled airspace, and always requires clearance from air traffic control (ATC). [4] It usually happens when the aircraft is inside controlled airspace, and the local weather is less than the minimums required for flight under visual flight rules (VFR) within the airspace in question.
Visual flight or visual attitude flying is the control of an aircraft via outside references (such as the sky or the runway in takeoff). [1] For aircraft, the primary visual reference used is usually the relationship between the aircraft's "nose" or cowling against the natural horizon .
NTSB Chairman Robert Sumwalt: “He was flying under Visual Flight Rules - or VFR - which legally prohibited him from penetrating the clouds. However, as we've seen in so many accidents, this ...
In 1965, the Federal Aviation Agency of the United States issued Advisory Circular AC 60-4, warning pilots about the hazards of spatial disorientation, which may result from operation under visual flight rules in conditions of marginal visibility. [6]