beacons

Definition/Scope: A light or electronic source which emits a distinctive or characteristic signal used for the determination of bearings, courses, or location.

Broader Terms:

navigational aids

Narrower Terms:

airborne beacons
crash locator beacons
emergency locator beacons
infrared beacons
localizers
personal locator beacons
radar beacons
radio beacons
rescue beacons
submarine locator acoustic beacons

Related Terms:

balisage
markers
meaconing
position indicators