Chapter 7.8 - Radionavigation Flashcards
Radionavigation Aids can be used to fix the position of an Aircraft except when the flight is what?
At or below 2000ft AGL.
What does ADF stand for?
Automatic Direction Finder.
What is an ADF?
Type of receiver on the Aircraft that indicates the direction of a NDB.
What does NDB stand for?
Non-Directional Beacon.
What is a NDB?
Ground-based transmitter.
Which broadcast stations do ADF use?
AM.
Name four purposes the NDB/ADF combination can be used for?
- Establishing a position line.
- Fixing a Position.
- Establishing Drift.
- Homing to an NDB.
What frequency band does NDBs operate in?
200 to 500 KHz.
What is the NDB for frequency for Archerfield, Brisbane?
419 KHz.
Where will low powered NDBs be used?
At Aerodromes.
Where will high powered NDBs be used?
In land (away from Aerodromes).
What is the low and high powered range of an NDB over land by day (2)?
- Low = 30 to 60 NM.
- High = 100 to 150 NM.
What is the low and high powered range of an NDB over land by night (2)?
- Low = 30 to 50 NM.
- High = 70 to 85 NM.
What is the high powered range of an NDB over water by day and night (2)?
- Day = 200 to 450 NM.
- Night = 110 to 150 NM.
Name two types of ADF and their abbreviations?
- Relative Bearing Indicator (RBI).
- Remote Magnetic Indicator (RMI).
How do you calculate the bearing to and from an NDB (2)?
- Add Heading and RBI reading together.
- Minus 360 (if number is larger than 360).
How does Thunderstorms affect NDB?
The electrical discharge will attract the needle to point to the Thunderstorm, rather than the NDB.
Name three details needed by a Pilot to use an NDB effectively?
- Frequency.
- Identification Code.
- Any Limitations.
What symbol is used to identify a limitation with a NDB? What should the Pilot then look up?
- Asterisk (*).
- Check ERSA for more information on limitation.
How can a Pilot tell if the Aircraft is close to an NDB?
Increased sensitivity of the ADF indicator needle.
How do you convert the ADF reading from Bearing to NDB to Bearing from NDB?
Minus 180 from figure (if bearing is greater than 360, minus 360).
What does VOR stand for?
VHF Omnidirectional Radio Range.
What is a VOR?
Ground-based transmitter and an airborne receiver/visual display.
What frequency band does VORs operate in and it’s channel spacing (2)?
- 108 to 118 MHz.
- Channel spacing of 50 KHz.
Name three purposes VOR can be used for?
- Establishing a position line.
- Fixing a Position.
- Tracking to/From/Homing to a VOR.
What are the imaginary lines radiating from the VOR called and how are their identified (2)?
- Radials.
- Magnetic Bearing from the Transmitter.
What does OBI stand for?
Omni Bearing Indicator.
What does OBS stand for?
Omni Bearing Selector.
What’s the purpose of an OBS?
Enables a Pilot to set Track Required (to the VOR station).
What does CDI stand for?
Course Deviation Indicator.
What is the Deviation Scale on the VOR indicator?
A scale of 5 dots either side of the central position with each dot representing 2° of displacement from Track Required.
What are the TO/FROM flags on the VOR indicator used for?
To sure the Bearing of the VOR station.
What’s the usable range of a VOR below 5000ft?
60 NM.
What’s the usable range of a VOR between 5000 and 9999ft?
90 MN.
What’s the usable range of a VOR between 10 000ft and 14 999ft?
120 NM.
What’s the usable range of a VOR between 15 000ft and 19 999ft?
150 NM.
What’s the usable range of a VOR above 20 000ft?
180 NM.
Name three details needed by a Pilot to use VOR effectively?
- Frequency.
- Identification Code.
- Any Limitations.
True or False. The CDI will move left or right if wind is affecting the Aircraft?
True.
Which system is more accurate ADF/NDB or VOR?
VOR.
What is Relative Bearing of a NDB?
Direction of the Station from the Aircraft’s Position.
What is Magnetic Bearing of a NDB?
The Position of the Station from Magnetic North.
