Types of VOR
CVOR: Conventional VOR is used to define airways and for en-route navigation.
BVOR: A broadcast VOR which gives weather and airfield information between beacon identification.
DVOR: A Doppler VOR – this overcomes siting errors.
TVOR: Terminal VOR which has only low power; and is used at major airfields.
VOT: This is found at certain airfields and broadcasts a fixed omni-directional signal for a 360° test radial. This is not for navigation use but is used to test an aircraft’s equipment accuracy before IFR flight. More than +/-4° indicates that equipment needs servicing.
VORTAC: Co-located VOR and TACAN (DME) beacons.