30 Questions
What is one of the advantages of having a GPS receiver module in a strapdown IRU?
Reduced need for inflight alignment
What is the function of an IRU in relation to GPS outages?
Fills in for GPS during outages
What is one of the benefits of using an IRU in conjunction with GPS?
Smoothing of noisy velocity outputs from GPS
What is the primary function of radio navigation in aviation?
To provide position information from ground stations
Why do older radio navigation systems use lower frequency bands?
Due to the age of the system and navigation requirement
What is the benefit of using radio navigation aids in aviation?
Navigation in all weather conditions with high accuracy and safety
What is the frequency at which the ILS marker beacons operate?
75 MHz
What is the purpose of the Outer Marker (OM) signal?
To indicate where an aircraft intercepts the glide path at the published altitude
What is the tone of the Middle Marker (MM) signal?
1300 Hz tone of dots and dashes
What is the location of the Inner Marker (IM) in relation to the runway threshold?
150 metres from the runway threshold
What is the rate of the Inner Marker (IM) signal?
6 per second
What is the trend of the sound and tone of the marker beacons as the aircraft approaches the airport?
The sound gets quicker and the tone higher
What is displayed on the HSI or RMI when a pilot tunes to an AM radio station?
The bearing to the radio station transmitter
What is normally used as an ADF reference?
A non-directional beacon (NDB) located at an airfield
What is a disadvantage of using an AM radio station as an ADF reference?
The reception is poor compared to normal AM radio reception
What is the result of the ADF's automatic direction-seeking qualities?
The bearing indicator always points to the station to which it is tuned
What is the easiest method of using an ADF?
Homing to the station
What should the pilot do to 'home' to the station using the ADF?
Turn the airplane until the ADF pointer points directly up
What is the primary function of the VOR receiver?
To receive, decode, and provide outputs of aircraft bearing information
What is the purpose of the self-monitoring circuits in the VOR receiver?
To validate the signals received and the accuracy of the bearing information
How many complete VOR systems are typically carried by commercial aircraft?
Two
What is the function of the VOR control unit?
To provide off-on control and frequency selection for the VOR system operation
What is the purpose of the paired DME or ILS channels in the VOR control unit?
To automatically tune to navigation frequencies within the 108-118 MHz range
What instrument can display bearing information from both VOR and ADF?
Radio Magnetic Indicator (RMI)
What is the primary method used by RADALT systems to determine height?
Measuring the time delay between signal transmission and reception
What is the typical altitude range of RADALT systems?
2500 feet
What is the frequency of operation of RADALT systems?
4.3 GHz
What is the purpose of the two antennas used in RADALT systems?
One for transmission and one for reception
What is the typical power output range of RADALT systems?
5 to 100 milliwatts
Where are the RADALT antennas typically mounted on the aircraft?
Flush mounted along the aircraft centreline on the underside of the fuselage
Learn about the benefits of having a GPS receiver module in strapdown Inertial Reference Units (IRUs), including inflight alignment and seamless fill-in for GPS outages. Discover how GPS enhances the functionality of IRUs in aircraft navigation.
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