AR 13 - Radio Navigation Aids Flashcards
Review Questions
What does the “Alert” annunciator on the Waypoint Information from indicate?
90 secs to the next waypoint or 90 secs to an abeam position if off track
What are the major components of ADF?
ADF receiver, antennae and a bearing indicator (RMI)
What kind if NAVAIDs are used with the ADF system?
Non-Directional beacons
The Automatic Radio Compass on the CT-142 uses which frequencies?
Low / medium
The Automatic Radio Compass on the CT-142 has which type of antennae?
Directional and fixed
The Automatic Radio Compass on the CT-142 receives signals from where? It indicates which type of continuous bearing to these transmitters?
NDB and commercial radio stations
Indicates Compass bearings
Readings from the Automatic Radio Compass on the CT-142 must be corrected for what to give AC True bearings?
AC variation and deviation
Because of it’s _______ band, the ADF is subject to interference.
Frequency
What are some specific causes of the interference encountered by the ADF?
Atmospheric noise and thunderstorms
Ground wave may become contaminated due to sky-waves
AC electrical fields and structures also cause interference
What is the accepted standard error for the ADF in good and poor conditions?
+/- 3° or +/- 30° in poor conditions
What is the range of the ADF?
200 - 50 NM (decreases at night due to sky wave contamination)
What is the name of the ADF on the CT-142? How many are there?
x2 King KDG 806 ADF
What are the components of the King KDG 806?
Radio compass receiver
Control display unit (#1 pilot side #2 co-pilot side)
Antenna assembly
Bearing indicators (pilot, co-pilot and ACSO consoles)
What are the Operating Freq Limits of the King KDG 806 ADF?
190.0 - 1799.0 KHz
The ADF needle indicates what of the transmitter?
Relative bearing
The RMI compass rose indicates what?
Compass bearing to the station.
Regarding the ADF, absent of muted audio represents what?
The selected frequency is too weak for dependable navigation, or that the FMS is on AUX Mode
VOR stands for what?
Very High Frequency Omni-directional Range.
Why is it that VOR avoids weather interference more so than the ADF?
It uses higher frequencies
The VOR can provide radials oriented to?
Magnetic, True or Grid North
What are the frequencies for the VOR’s:
VHF
ILS Frequencies: Localizer and Glidescope
VHF 108.00 - 117.75 MHz
ILS Freq:
- 10 - 111.95 Localizer (VHF)
- 95 - 334.70 Glidescope (UHF)
What are the principles of VOR Airbourne Reception?
Equipment on AC receives two 30 MHz signals from a VOR ground station
Measures phase difference
Converts phase difference to a radial which is displayed on the Remote Magnetic Indicator (RMI)
To plot a VOR, the radial is plotted from the VOR with a protractor aligned to?
Station north, found in the GPH 205
VORs are normally aligned to _______ north in the Southern Domestic Airspace and ____ north in the Northern Domestic Airspace.
Mag and True
What is the theoretical accuracy of a VOR? What is the accepted accuracy at 402?
+/- 2 - 5°
+/- 2.5°
What kind of operation is a VOR?
LOS
What side effects is VOR affected by?
Echoes from hills and buildings
Magnetic anomalies
What is the cone of confusion for a VOR? What does it mean
80°
80° above the transmitter bearings are either unobtainable or unusable
Describe the VOT (VHF Test)
Transmits a signal permitting inspection of VOR receiver without knowing your specific radial from the VOR
Describe Tactical Air Navigation (TACAN)
Military, LOS radio nav aid
Continuous range and bearing information
Theoretically more accurate than either VOR or ADF
What kind of calculations describe TACAN operation?
Radial (azimuth) calculation
DME (distance) calculation
Regarding TACAN and DME capabilities, what frequency and operation does it use?
UHF & Range LOS
Regarding TACAN and DME capabilities, how many channels can it use?
126 X mode and 126 Y mode channels
Regarding TACAN and DME capabilities, what can the cone of confusion range from?
60 - 110° across depending on ground site
Regarding TACAN and DME capabilities, what is its bearing and DME slant range accuracy?
Bearing accuracy: +/- 3/4
DME slant range accuracy +/- 1nm
TACANs are normally aligned where in the Southern Domestic Airspace?
Mag north
What is the name of the TACAN on the CT 142?
King KTU 709 TACAN
How many TACAN systems are on the CT 142?
One
What does the TACAN system comprise of?
Antenna (located on lower forward fuselage)
TACAN system (located in second avionics rack)
NAV/ TAC controller (located on the Pilot’s side of the glare shield)
What is a VORTAC?
A radio navigation beacon for aeronautical navigation which comprises of co-located VOR and TACAN beacons.
True or false
A pilot may navigate towards but not away from a radio navigation beacon along the intended route.
False, a pilot may navigate towards or away from a radio navigation
If drift information is available, the pilot will apply the drift and _____ the navaid.
Track
If no drift information is applied, the needle is placed on the nose and the aircraft is said to be ______ the navaid.
Homing
Review Questions
What must be applied to the COMPASS bearing to the a true bearing for ADF fixing?
The deviation of the associated RMI and the aircraft’s local variation
Review Questions
What is the frequency range of the (ADF) King 806 ARC?
190.0 - 1799.0 KHz
Review Questions
What will happen is the VORs are not able to receive a signal (off, ILS too far form the station)
The needle parks at 3/9 o’clock position
Review Questions
How is DME calculated?
Measuring the time interval between interrogation and the response is converted to range
(Go to PPT, write it down correctly)
Review Questions
How do you plot a radial from a VOR?
The radial is plotted from the VOR with a protractor lined to the station North (must be found in GPH 205)
Review Questions
What’s the difference between tracking and homing a navaid?
