Chadshill From United Kingdom, joined Oct 2000, 29 posts, RR: 0 Posted (11 years 8 months 3 weeks 3 days 14 hours ago) and read 1046 times:
Can anyone enlighten me ?
I live directly under the flightpath to MAN and was listening today to a pal`s airband radio - I kept hearing the phrase "Passing the Outer Marker" just as the a/c was directly over where I live...
I`m sure this must have something to do with radar, but can anyone tell me what is the `outer marker`, and is there also an `inner marker` ?
Christianbothe From Germany, joined Jan 2000, 124 posts, RR: 0 Reply 1, posted (11 years 8 months 3 weeks 3 days 13 hours ago) and read 1033 times:
Yes, there are outer, middle and inner markers. These are beacons, the outer marker being a Non-directional beacon that could also be used as a navigation fix. When the aircraft passes over the outer marker, about half way through the ILS approach (about 6 miles), the pilot gets a sound and a light going on. The middle marker is about 1 or 2 miles from the runway threshold, and the inner is just a few seconds before touchdown.
So when you reach the outer marker, you know it's about time to get on the glidepath...
Check out this photo: The lights for the markers are the white, red and blue lights at the very left edge of the picture.
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