For nearly half a
century, John Wayne Airport (JWA) has operated two runways, a commercial
runway – one left and one nine right (1L-19R), and a general aviation
runway – one right and one nine left (1R-19L). Runways can be used in
both directions, and therefore have opposite 180 degree headings at each
end (e.g. 1L-19R, 1R-19L). The two numbers always differ by 18 (=
180°).
Effective July 24, 2014, due to a gradual shift of the
Earth’s magnetic poles, JWA’s runways will get new number designations.
JWA’s commercial runway will become two left and two zero right
(2L-20R), and the general aviation runway will become two right and two
zero left (2R-20L).
While there is no impact to the general
public, the change will require revision of Federal Aviation
Administration (FAA) publications, runway markings and pilot charts.
Per
the FAA Aeronautical Information Manual, a runway number is the whole
number nearest one-tenth the magnetic bearing of the centerline of the
runway, measured clockwise from the magnetic north. The magnetic north
rotates about one degree every 12 years or five degrees every 60 years.
New
signage and runway markings will be installed overnight on July 23,
2014, with the new designation in place on Thursday, July 24, 2014.
The preceding article was released by John Wayne Airport.
Source: http://www.oc-breeze.com
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