![]() ![]() With AeroNav Products, and be accomplished sufficiently in advance toĪllow for procedural amendments. Of the runway designator number should be a matter of joint agreement Instrument approach or departure procedures, to determine theĪppropriate MV to be applied to the runway true bearing. Revising runway designator numbers for an airport having one or more Regional Airports Division/Airports District Office (ADO).Ĭoordinate with the applicable OSG-FPT prior to establishing or (5) Western, Central, and Eastern OSG-FPTs.į. (4) Western, Central, and Eastern Technical Operations. Management and control of Epoch Year MV values Required to maintain reasonable proximity of alignment with theĮarth’s ever-changing magnetic field. ![]() Periodic updating of the MV assigned to navigation facilities is This value is applied to trueĭirections to obtain the magnetic values for radials, courses,īearings, and headings published in instrument flight procedures. Value of MV is assigned to each navigational aid and airport as the In order toĪssist in stabilizing the National Airspace System (NAS), a fixed Changing values for MV are tabulated and published onĪ 5-year epoch basis e.g., 00, 05, 10, 15, 20, etc. Magnetic variation (MV) information and tools for establishing Survey (NGS), for all areas of the United States and its territoriesįor application to navigation charts and maps, is the source for (NOAA), National Ocean Service (NOS), and the National Geodetic The National Oceanic and Atmospheric Administration Implementing Epoch Year Magnetic Variation (MV)Ī. Long Version - Quotes from FAA Order 8260.19E (above) In your case, the annual rate of change for Farmingdale airport (as of 2010) is 0.0 deg East, so I don't see that happening for awhile. So in your example, 145 is still valid as runway 14, and they wouldn't need to change it until it exceeds 148 deg. AC 150/5340-1L - Standards for Airport Markings contains the official runway designator rules (paraphrased): If the actual magnetic course of the runway ends in 5, it can use either number, otherwise you round to the closest runway number (there are some variations for special cases like parallel runways and such, but this covers most runways). They are supposed to change it when it is more than three degrees off from what it is should to be. When a determination is made that a runway number should be changed, they coordinate with several other groups (such as AeroNav Products, OSG-FPT, the applicable Airportt Traffic Service Area Office, and the Airports Division), to choose the actual number used, based on "careful consideration and evaluation of a number of factors" and then to make the actual changes in charting, runway markings and signs, etc. ![]() They work with a bunch of different offices, and different branches of the military as they make adjustments. NOAA, NOS, and NGS (see below) provide the magnetic variation information, and publish it every five years. Pole-its magnetic variation-and makes changes to runways and flight “Every five years, the FAA reevaluates shifts in the Ongoing,” according the Kathleen Bergen, a spokeswoman for the FAA “Adjustments to runways like this and to navigational aids are Simple VersionĪccording to an article by the NBAA called " How Changes in Magnetic North Are Impacting Airports": ![]() There is a ton of related information in FAA Order 8260.19E and it has the details. Implementing changes to runway numbers is quite complicated and requires a lot of different parties to get involved. ![]()
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