VFR

The Verein für Raumschiffahrt (VfR - "Spaceflight Society") was an association of amateur rocket enthusiasts active in Germany from 1927 to 1933. It brought together many of the engineers who would make important contributions to early space flight.The society was founded in Breslau on July 5, 1927 by Johannes Winkler, and amongst the first members were Max Valier, Willy Ley, and Walter Neubert. They were later joined by Klaus Riedel, Rudolf Nebel, Wernher von Braun, Hermann Oberth, Walter Hohmann, Hermann Noordung, Kurt Heinisch, Eugen Sänger, Rolf Engel and Arthur Rudolph, and eventually had a membership of some 500 people. The society produced a periodical, Die Rakete (The Rocket).
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Visual flight rules (VFR) are a set of aviation regulations under which a pilot may operate an aircraft in weather conditions sufficient to allow the pilot, by visual reference to the environment outside the cockpit, to control the aircraft's attitude, navigate, and maintain safe separation from obstacles such as terrain, buildings, and other aircraft.
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Meteorological conditions that are less than those required for basic Visual Flight Rules (VFR) flight in controlled airspace and in which some aircraft are permitted flight under visual flight rules. (14CFR1)

Aircraft operating in accordance with clearances within controlled airspace in meteorological conditions less than the basic Visual Flight Rules (VFR) weather minimum. Such operations must be requested by the pilot and approved by ATC. (14CFR1)

Rules that govern the procedures for conducting flight under visual conditions. The term (VFR) is also used in the U.S. to indicate weather conditions that are equal to or greater than minimum Visual Flight Rules (VFR) requirements. In addition, it is used by pilots and controllers to indicate type of flight plan. (FAA13) (FAA14)

Weather conditions equal to or better than the minimum for flight under visual flight rules. (FAA8)

Flight conducted in accordance with Visual Flight Rules. (FAA2) (FAA10)

With respect to the operation of aircraft, means the operation of an aircraft over-the-top under Visual Flight Rules (VFR) when it is not being operated on an Instrument Flight Rules (IFR) flight plan. (14CFR1)

Depict Class B airspace which provides for the control of segregation of all the aircraft within Class B airspace. The chart depicts topographic information and aeronautical information which includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstructed and related data. (FAA4)

An airport traffic control tower providing takeoff and landing services only. It does not provide approach control services. (FAA10) (FAA13) (FAA14)

Visual Flight Rules
  

Visual Flight Rules
  

(See VISUAL FLIGHT RULES.)