Marker beacon

A marker beacon is a particular type of VHF radio beacon used in aviation, usually in conjunction with an instrument landing system (ILS), to give pilots a means to determine position along an established route to a destination such as a runway.^[1]

According to Article 1.107 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR)^[2] a marker beacon is defined as "a transmitter in the aeronautical radionavigation service which radiates vertically a distinctive pattern for providing position information to aircraft".

^ Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 186. ISBN 9780850451634.
^ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.107, definition: marker beacon

[1] Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 186. ISBN 9780850451634.

[2] ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.107, definition: marker beacon

[1]

[2]