VOR's Flashcards
VOR
Very highly frequently Omni directional range
Two different types of equipment
Variable phase signal sent out in one direction but rotating 1800 times per min
Reference phase signal emitted in all directions when variable phase is at 360
Ground equipment
Transmits radial outwards in every direction there is one radial for every degree
VOR/DME and VORTAC provide distance and course guidance
Frequencies 108.00 117.95
Line of sight which limits use at lower altitudes
Accurate within one degree
Airborne equipment
Antenna, receiver and an indicator
Indicator consists of
OBS (Omni bearing selector) twist knob to select desired radial and or center needle
CDI (course deviation indicator)needle show how far off the radial aircraft is or isnt
To/from indicator tells us if we are going to or from the station
VVOr navigation
Tune to frequency and identify station with mores code
Determine radial by twisting obs knob until needle centers and indicates TO
Select radial by
Twisting obs to desired radial and flying towards the needle
Always fly to the station with to flag and from with from flag
Terminal VOR
-25 Nm below 12,000 AGL
Low altitude VOR
-40 NM between 1000-18000 AGL
High altitudes VOR (most common)
-40nm up to 14,500 AGL 100nm 14,500-18,000 AGL 130nm 18,000-45,000 AGL 100nm 45,000-60,000 AGL See page 562 in chart supplement
Types of VORs
VOR= VHF VOR- civil use VOR/DME= VHF VOR & VHF DME- civil use TACAN= VHF VOR & UHF DME - military VORTAC = VOR & TACAN - military/ civil
VOR CAUTIONS
Come of confusion Flight over top of VOR flag my go away Continue to fly magnetic heading Reverse sensing ( set needle to desired radial)
DME
Distance measurement equipment Gives us Distance in Nm Ground speed ETE to station 199 nm range/line of sight Responds to 100 strongest signals
Slant range distance
The higher and closer you are to DME the greater the error
Prevention stay below 1000 per 1 nm
Takes altitude into distance calculation
ETE accurate when flying directly to station
