navigation acronyms, abbreviations and definitions - International ...

Volpe John A Volpe National Transportation Systems Center (US)
Produced the report ‘Vulnerability Assessment of the Transportation
Infrastructure Relying on the GPS’, dated 29 Aug 01.
VOR VHF Omnidirectional Range
VORTAC collocated VOR and TACAN
VOSL value of statistical life
VPL vertical protection limit (WAAS)
Used by VAL in precision approach.
VPL HO
fault-free vertical protection limit
VPN virtual private network
VPP variable pitch propeller
VPS Vehicle Positioning Systems (=MPS)(term used in Hong Kong)
VR virtual reality
VRD virtual retinal display
Data projected onto lightweight spectacles.
VRM variable range marker
VRML Virtual Reality Model Language
VRP vehicle routing problem
VRP vessel response plan
VRP visual reporting point (air)
VRS virtual reference station (technique for RTK)
VRSS virtual reality ship simulator
VS vertical speed
VSAT very small aperture terminal (eg ship comms)
VSI vertical speed indicator
VSWR voltage standing wave ratio
VTE vessel technical error
VTEC vertical total electron content (of ionosphere)
VTIS vessel traffic information system
VTM vessel traffic management
VTMD Vessel Traffic Monitoring Directive (EC Directive 2002/59/EC)
VTMIS vessel traffic management and information services
VTMIS-NET VTMIS Network (EC DG VII)
VTMS vessel traffic management service
vTRC Virtual Transport Research Centre (ESRC)
VTS vehicle traffic system
VTS vessel traffic service/system
VTSO vessel traffic service operator
VTSS vessel traffic separation scheme
VTUAS vertical take-off unmanned air system
VUNE vertical component of the user navigation error
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