Radar Contact Glossary
Version 4 December 2, 2007
Copyright JDT LLC 2005 Page 279
Glossary
The definitions listed below are directly from the FAA Pilot/Controller Glossary. You may find additional definitions through this link: http://www.faa.gov/atpubs/PCG/. ABORT- To terminate a preplanned aircraft maneuver; e.g., an aborted takeoff. ACKNOWLEDGE- Let me know that you have received my message. ADVISE INTENTIONS- Tell me what you plan to do. ADVISORY- Advice and information provided to assist pilots in the safe conduct of flight and aircraft movement. AFFIRMATIVE- Yes. AIRCRAFT CLASSES- 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 more than 255,000 pounds whether or not they are operating at this weight during a particular phase of flight.
b. Large- Aircraft of more than 41,000 pounds, maximum certificated takeoff weight, up to 255,000 pounds.
c. Small- Aircraft of 41,000 pounds or less maximum certificated takeoff weight.
AIR ROUTE TRAFFIC CONTROL CENTER- A facility established to provide air traffic control service to aircraft operating on IFR flight plans within controlled airspace and principally during the enroute phase of flight. When equipment capabilities and controller workload permit, certain advisory/assistance services may be provided to VFR aircraft. AIR TRAFFIC CONTROL- A service operated by appropriate authority to promote the safe, orderly, and expeditious flow of air traffic. ALTERNATE AIRPORT- An airport at which an aircraft may land if a landing at the intended airport becomes inadvisable. AUTOMATIC TERMINAL INFORMATION SERVICE (ATIS)-The continuous broadcast of recorded non-control information in selected terminal areas. Its purpose is to improve controller effectiveness and to relieve frequency congestion by automating the repetitive transmission of essential but routine information. CARDINAL ALTITUDES- "Odd" or "Even" thousand-foot altitudes or flight levels; e.g., 5,000, 6,000, 7,000, FL 250, FL 260, FL 270. CEILING- The heights above the earth's surface of the lowest layer of clouds or obscuring phenomena that is reported as "broken," "overcast," or "obscuration," and not classified as "thin" or "partial."
Radar Contact Glossary
Version 4 December 2, 2007
Copyright JDT LLC 2005 Page 280
CLEARANCE VOID IF NOT OFF BY (TIME)- Used by ATC to advise an aircraft that the departure clearance is automatically canceled if takeoff is not made prior to a specified time. The pilot must obtain a new clearance or cancel his/her IFR flight plan if not off by the specified time. Radar Contact – you will hear this when picking up your clearance through Flight Services. CLEARED AS FILED- Means the aircraft is cleared to proceed in accordance with the route of flight filed in the flight plan. This clearance does not include the altitude, DP, or DP Transition. CLEARED (Type of) APPROACH- ATC authorization for an aircraft to execute a specific instrument approach procedure to an airport; e.g., "Cleared ILS Runway Three Six Approach." CLEARED FOR TAKEOFF- ATC authorization for an aircraft to depart. It is predicated on known traffic and known physical airport conditions. CLEARED TO LAND- ATC authorization for an aircraft to land. It is predicated on known traffic and known physical airport conditions. COMPASS LOCATOR- A low power, low or medium frequency (L/MF) radio beacon installed at the site of the outer or middle marker of an instrument landing system (ILS). It can be used for navigation at distances of approximately 15 miles or as authorized in the approach procedure.
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