Non-directional beacon
Non-Terminal NDB Approach
London Gatwick Airport - Historical approach charts - Military Airfield Directory
ENR 4.1 Navigation Aids – En Route
London Gatwick Airport - Historical approach charts - Military Airfield Directory
Confluence Mobile - AIXM Confluence
Marker beacon | Article about marker beacon by The Free Dictionary
Marker beacon - Wikipedia
Non-Directional Radio Beacon (NDB)
Pilotscafe Understanding ILS
Confluence Mobile - AIXM Confluence
ATPL Theory - Marker Beacons Marker Beacons are stations on the ground. When you fly overhead they will let you know by means of a visual or a sound (can be both).
What is an NDB or Non-Directional Beacon?
Outer marker | NDB - non-directional beacon
Radio beacons in Ireland in the 1950s - Military Airfield Directory
Confluence Mobile - AIXM Confluence
Non-directional beacon - Wikipedia
Non-directional beacon - Wikipedia
Radio beacons - FlightGear wiki
VTW: Navaids Pictures
Confluence Mobile - AIXM Confluence
Historical radio beacons, Yugoslavia 1950s - Military Airfield Directory
Confluence Mobile - AIXM Confluence
ENR 4.1 Navigation Aids – En Route
