Locator outer marker (LOM). NDB compass locator, collocated with an outer marker (OM).
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Locator middle marker (LMM)
Compass locator
Outer marker
Marker beacon
MM. Middle marker.
outer marker - A marker beacon at or near the glideslope intercept altitude of an ILS approach. It is keyed to transmit two dashes per second on a 400 Hz tone, which is received aurally and visually by compatible airborne equipment.
Outer Marker (OM) - An Instrument Landing System navigation facility in the terminal area navigation system located four to seven miles from the runway edge on the extended centerline indicating to the pilot that he/she is passing over the ...
Outer Marker (OM): An ILS navigation facility located four to seven miles from the runway edge on the extended centerline which indicates both aurally and visually, that the aircraft is passing over the facility and can begin its final approach.
Outer Marker-beacon: A radio beacon comprising part of a blind approach installation which defines a predetermined distance from the aerodrome boundary.
Outer marker.
Marker beacon located 5-7mi from the end of the runway; See Also: marker beacon
Outside Air Temperature (OAT).
The temperature just outside the aircraft; Symbols: T; Typical Units: deg; Dimensions: Temperature ...
Part 3 Outer marker
You cannot fly an ILS if the outer marker is out and no other authorized definition/substitution for the fix exists. AIM 1010 and FAR 91.175(k) The outer marker is five miles from runway. It is the Blue light.
The Outer Marker provides a height and instrument check reading to aircraft that are close to or already on final approach to the runway. This allows the pilot to verify that the ILS is working properly.
- OUTER MARKER The outer marker should be located 7.2 km (3.9 NM) from the threshold except that, where this distance is not practicable, the outer marker may be located between 6.5 and 11.1 km (3.5 and 6 NM) from the threshold.
of the following electronic components and visual aids: (1) LOCALIZER- the component of an ILS which provides course guidance to the runway, (2) GLIDESLOPE- provides vertical guidance for aircraft during approach and landing, (3) OUTER MARKER- A ...
The procedure calls for crossing the outer marker at 3600 MSL and then descending to 2820 MSL, which is the Minimum Descent Altitude. That means that on final approach, you are supposed to be 1157 feet above the airport.
The outer marker causes a blue light to flash and beeps in a series of Morse code dashes. It typically marks the point where an aircraft can begin its final descent.
The outer marker OM is situated at or near the glideslope intercept altitude of the ILS localiser, the middle marker (MM) defines a point on the glideslope at or near decision height (DH).
A Skyhawk could even conceivably maintain 110 knots down the ILS to stay ahead of the Citation at the outer marker.
 See also: Aircraft, Pilot, Navigation, Flight, Runway
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