IR Radio Navigation

Night effect which causes loss of signal and fading, resulting in bearing errors from NDB transmissions is due to?

• Skywave distortion of the null position and is maximum at dawn and dusk

• Interference from other transmissions and is maximum at dusk when erase of the NDB

• Static activity increasing at night, particularly in the lower frequency band

• The effect of the aurora boreal is

A failed RMI rise is locked on 090º and the ADF pointer indicates 225º. The relative bearing to the station is:

• 135º

• impossible to read, due to failure RMI

• 315º

• 225º

Which of the following is the most significant error in ADF

• Quadrantal error

• Coastal refraction

• Precipitation static

• Static of CB

A radio beacon has range of 20NM over water. By what factor should the power be increased to achieve a range of 40NM

• 16

• 2

• 4

• 8

Transmissions from VOR facilities may be adversely affected by

• Static interference

• Uneven propagation over irregular ground surfaces

• Night effect

• Quadrantal error

The RMI indicated aircraft magnetic heading. To convert the RMI bearings of NDBs and VORs to true bearings the correct positions to read magnetic variations are:

• VOR: aircraft position, NDB: beacon position

• VOR: beacon position, NDB: beacon position

• VOR: beacon position, NDB: aircraft position

• VOR: aircraft position, NDB: aircraft position

Which frequency band is used by VOR for transmissions

• SHF

• UHF

• VHF

• HF

When the term “radial” is used in reference to VOR it means

• The magnetic bearing of the VOR station

• The magnetic bearing from the VOR station

• The magnetic bearing of the aircraft to the station

• The true bearing from the VOR station

The principle used to measure VOR bearings is:

• Phase comparision

• Switched cadioids

• Difference in depth of modulation

• Pulse technique

An aircraft is flying on a heading of 270º(M) the VOR OBS is also set to 270º with the full left deflection and FROM flag displayed. In which sector is due the aircraft from the VOR ground station

• SE

• SW

• NW

• NE