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In the United States, the outer marker has often been combined with a non-directional beacon (NDB) to make a locator outer marker (LOM). An LOM is a navigation aid used as part of an instrument landing system (ILS) instrument approach for aircraft. Aircraft can navigate directly to the location using the NDB as well as be alerted when they fly ...
ILS approach LM land and marine LMM Locator middle marker LNAV lateral navigation LOA letter of authorization FAA: LOC localizer: LOC loss of control: LOCI loss of control inflight: LOFT line-oriented flight training: LOM limitation of movement LOM locator outer marker: LOPA Location of Passenger Accommodations: LORAN Long-range navigation: LOTC
NDBs may designate the starting area for an ILS approach or a path to follow for a standard terminal arrival route, or STAR. In the United States, an NDB is often combined with the outer marker beacon in the ILS approach (called a locator outer marker, or LOM); in Canada, low-powered NDBs have replaced marker beacons entirely. Marker beacons on ...
ILS planes. An instrument landing system operates as a ground-based instrument approach system that provides precision lateral and vertical guidance to an aircraft approaching and landing on a runway, using a combination of radio signals and, in many cases, high-intensity lighting arrays to enable a safe landing during instrument meteorological conditions (IMC), such as low ceilings or reduced ...
The aircraft, flying at 3,000 feet (910 m), had been vectored by Boston's approach control to intercept the final approach course to the ILS runway 4R approach at a 45-degree angle, [a] about 2 nautical miles (3.7 km; 2.3 mi) outside the outer marker. [4]
A marker beacon is a specialized beacon used in aviation, in conjunction with an instrument landing system (ILS), to give pilots a means to determine distance to the runway. Marker beacons transmit on the dedicated frequency of 75 MHz. This type of beacon is slowly being phased out, and most new ILS installations have no marker beacons.
A modulation depth comparison navigational aid (MDCNA), also known as an Instrument landing System, uses the concept of space modulation to provide guidance to aircraft when on final approach.
A transponder landing system (TLS) is an all-weather, precision landing system that uses existing airborne transponder and instrument landing system (ILS) equipment to create a precision approach at a location where an ILS would normally not be available.