Is there a standard for the distance and position that an outer marker is located, or do they just put them where there's room?
2006-06-23 06:32:54 · 6 answers · asked by Anonymous in Cars & Transportation ➔ Aircraft
The LOM (Locator Outer Marker) is between 3 and 6 nautical miles (NM) from the runway threshold. They're not just put out there to mark the airport, they are part of an ILS (Instrument Landing System), so they are always in line with a runway, and at 3.9NM whenever possible.
2006-06-23 06:48:51 · answer #1 · answered by Flyboy 6 · 2⤊ 0⤋
From the AIM:
"The Outer Marker normally indicates a position at which an aircraft at the appropriate altitude on the localizer course will intercept the ILS glide path".
Since terrain and obstacles will affect the "appropriate altitude", the answer to your question is no, there is not a specific distance - if you are higher you will be further away!
The standard glide path is 3 degrees, this means the glide path will NORMALLY intersect the outer marker at an altitude of about 1,400ft above runway elevation. However, If there are obstacles on the approach path (they must still be below the 3 degree plane plus allow for the required obstacle clearance requirements, or an ILS approach will not be available) which require a higher altitude to clear them safely then it figures that you will be further away when you intercept that glide path - that is where the OM will be!
2006-06-24 01:12:06 · answer #2 · answered by bevl78 4 · 0⤊ 0⤋
An outer marker is typically 4-7 nautical miles from the runway.
2006-06-23 13:49:46 · answer #3 · answered by jrc 3 · 0⤊ 0⤋
No there is not. Usually 5 or 6 miles from the approach end of the runway, alined with the runway's centerline. They are also known as fan markers.
2006-06-23 19:14:37 · answer #4 · answered by Anonymous · 0⤊ 0⤋
I think the standard distance is either 10 or 20 miles from the airport.
This is a very good question, thank you for asking something on here that is rather intelligent. Far too many morons on here are asking either stupid questions or just plain sick and/or perverted ones
have a great day
2006-06-23 13:40:36 · answer #5 · answered by flguy36 3 · 0⤊ 0⤋
I dont believe that there`s an ICAO standart..... Its got to do with the amount of traffic, conjestion, and noise restraints around the airport, and its aproche paths....
2006-06-23 13:45:34 · answer #6 · answered by bushpilotguy 1 · 0⤊ 0⤋