Metropolitan Washington Airport Authority

Dulles International Airport

Resources and Downloads


For the purposes of Wake Turbulence Separation Minima, ATC
classifies aircraft as Heavy, Large, and Small as follows:

a. Heavy. Aircraft capable of takeoff weights of 300,000 Lbs or more     whether or not they are operating at this weight during a particular     phase of flight.
b. Large. Aircraft of more than 12,500 pounds, maximum certificated     takeoff weight, up to 300,000 pounds.
c. Small. Aircraft of 12,500 pounds or less maximum certificated     takeoff weight.
CEQ Council on Environmental Quality - Coordinates federal environmental efforts and works closely with agencies and other White House offices in the development of environmental policies and initiatives.
DOAV Virginia Department of Aviation - The Virginia Department of Aviation (DOAV) is a state transportation agency. The mission of the DOAV is to "progressively develop and maintain a safe, technologically advanced, market-driven air transportation system that provides the citizens of Virginia with convenient and efficient access to the expanding world community."
FAA Federal Aviation Administration
EIS Environmental Impact Statement - A document prepared to describe the effects for proposed activities on the environment. "Environment," in this case, is defined as the natural and physical environment and the relationship of people with that environment. This means that the "environment" considered in an EIS includes land, water, air, structures, living organisms, environmental values at the site, and the social, cultural, and economic aspects.
Easement The right to use or access property for a certain time limit without owning it - similar to property "rental." When you secure an easement you pay the owner for that right, but you do not retain ownership of that property.
IFR Instrument Flight Rules - Rules governing the procedures for conducting instrument flight. Also a term used by pilots and controllers to indicate type of flight plan.
ILS Instrument Landing System - A precision instrument approach system.
MOU Memorandum of Understanding
MWAA Metropolitan Washington Airports Authority - Governed by a 13-member Board of Directors with five members appointed by the Governor of Virginia, three by the Mayor of the District of Columbia, two by the Governor of Maryland and three by the President of the United States, the Airports Authority operates a two-airport system that provides domestic and international air service for the mid-Atlantic region. The Airports Authority is self-supporting, using aircraft landing fees and revenues from concessions to fund operating expenses. The Authority is not taxpayer-funded.
MWCOG Metropolitan Washington Council of Governments - MWCOG is a regional organization of Washington area local governments whose mission is to enhance the quality of life and competitive advantages of the Washington metropolitan region in the global economy
NAVAIDS Navigational Aids such as lighting systems and electronic signalization that help guide an aircraft for a safe and exact approach to an airport.
NEPA National Environmental Policy Act - Establishes a national policy for the environment, provides for the establishment of a Council on Environmental Quality, and for other purposes.
Parallel Runways Two or more runways at the same airport that are oriented in the same alignment. In addition to runway number, parallel runways are designated as L (left) and R (right) or, if three parallel runways exist, L (left), C (center) and R (right).
ROD Record of Decision - An official document that states the responsible federal agency's findings on the proposed project and sets forth conditions under which federal approval of a proposed project is granted.
Separation For runways, this is the lateral distance between the centerlines of two or more parallel runways.
VFR Visual Flight Rules - Rules that govern the procedures for conducting flight under visual conditions. The term "VFR" is also used in the United States to indicate weather conditions that are equal to or greater than minimum VFR requirements. In addition, it is used by pilots and controllers to indicate type of flight plan.