Advantages of GPS in Strapdown IRUs

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What is one of the advantages of having a GPS receiver module in a strapdown IRU?

Enhanced radar functionality

Increased GPS outages

Improved pilot visibility

Reduced need for inflight alignment (correct)

What is the function of an IRU in relation to GPS outages?

Fills in for GPS during outages (correct)

Causes GPS outages

Enhances GPS signals

Provides alternative navigation

What is one of the benefits of using an IRU in conjunction with GPS?

Smoothing of noisy velocity outputs from GPS (correct)

Improved GPS accuracy

Increased pilot workload

Reduced GPS reliability

What is the primary function of radio navigation in aviation?

To provide position information from ground stations Signup and view all the answers

Why do older radio navigation systems use lower frequency bands?

Due to the age of the system and navigation requirement Signup and view all the answers

What is the benefit of using radio navigation aids in aviation?

Navigation in all weather conditions with high accuracy and safety Signup and view all the answers

What is the frequency at which the ILS marker beacons operate?

75 MHz Signup and view all the answers

What is the purpose of the Outer Marker (OM) signal?

To indicate where an aircraft intercepts the glide path at the published altitude Signup and view all the answers

What is the tone of the Middle Marker (MM) signal?

1300 Hz tone of dots and dashes Signup and view all the answers

What is the location of the Inner Marker (IM) in relation to the runway threshold?

150 metres from the runway threshold Signup and view all the answers

What is the rate of the Inner Marker (IM) signal?

6 per second Signup and view all the answers

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 Signup and view all the answers

What is displayed on the HSI or RMI when a pilot tunes to an AM radio station?

The bearing to the radio station transmitter Signup and view all the answers

What is normally used as an ADF reference?

A non-directional beacon (NDB) located at an airfield Signup and view all the answers

What is a disadvantage of using an AM radio station as an ADF reference?

The reception is poor compared to normal AM radio reception Signup and view all the answers

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 Signup and view all the answers

What is the easiest method of using an ADF?

Homing to the station Signup and view all the answers

What should the pilot do to 'home' to the station using the ADF?

Turn the airplane until the ADF pointer points directly up Signup and view all the answers

What is the primary function of the VOR receiver?

To receive, decode, and provide outputs of aircraft bearing information Signup and view all the answers

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 Signup and view all the answers

How many complete VOR systems are typically carried by commercial aircraft?

Two Signup and view all the answers

What is the function of the VOR control unit?

To provide off-on control and frequency selection for the VOR system operation Signup and view all the answers

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 Signup and view all the answers

What instrument can display bearing information from both VOR and ADF?

Radio Magnetic Indicator (RMI) Signup and view all the answers

What is the primary method used by RADALT systems to determine height?

Measuring the time delay between signal transmission and reception Signup and view all the answers

What is the typical altitude range of RADALT systems?

2500 feet Signup and view all the answers

What is the frequency of operation of RADALT systems?

4.3 GHz Signup and view all the answers

What is the purpose of the two antennas used in RADALT systems?

One for transmission and one for reception Signup and view all the answers

What is the typical power output range of RADALT systems?

5 to 100 milliwatts Signup and view all the answers

Where are the RADALT antennas typically mounted on the aircraft?

Flush mounted along the aircraft centreline on the underside of the fuselage Signup and view all the answers