outer marker


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outer marker

[′au̇d·ər ′mär·kər]
(navigation)
That instrument landing system (ILS) marker farthest from the approach end of the instrument runway; the marker is located 4.5 miles ± 1000 feet (7240 ± 305 meters) from the end of the runway and not more than 250 feet (75 meters) from the extended center line of the runway.

outer marker

An ILS (instrument landing system) navigational facility in the terminal area navigation system located at 4 to 7 miles (6 to 11 km) from the runway edge on the extended centerline. It transmits a 75-MHz fan-shaped radiation pattern, modulated at 400 Hz (fan markers and station markers radiate at 3000 Hz, whereas middle markers do so at 1300 Hz), keyed at two dashes per second, and received by compatible airborne equipment. It indicates to the pilot, both aurally and visually, that he or she is passing over the facility and can begin the final approach. See instrument landing system.
References in periodicals archive ?
I accept it is the driver's foot on the pedals - the car doesn't make its own way to the outer marker.
An instructor can stop the flight in midair, discuss technique and procedures with the student, then punch a few buttons and instantly place the 'airplane' in whatever training scenario or weather condition is called for - at the end of the runway for takeoff; intercepting the outer marker for an instrument approach; or cruising nearly eight miles above the surface of the earth on a transcontinental route.
Tenders are invited for Annual maintenance contract i/c supply of b check kit for kirloskar, cummins n ashok leyland make dg setsat arsr radar, outer marker vashi, andheri tx.