RNAV 4

What is the period of validity of the navigational database for FMC units?

• 7 days.

• 14 days.

• 21 days.

• 28 days.

The principle of operation of an ILS is:

• the difference in depth of modulation.

• the phase comparison.

• the difference between the frequencies of the two tones.

• modulation of the ILS frequency by the amplitude of two modulating signals.

Clock bias is the process of correcting the pseudorange for:

• receiver clock errors.

• satellite clock errors.

• receiver and satellite clock errors.

• UTC errors.

Which of the following statements is correct with respect to a RF signal:

• the plane of polarisation is determined by the oscillator unit in the transmitter.

• the electrical component of the signal is parallel to the antenna.

• the magnetic component of the signal is parallel to the antenna.

• both the electrical and magnetic components are parallel to the antenna.

In order to determine 'ionospheric delay' corrections on a civilian aeroplane:

• the signals from the C/A and P codes are matched.

• the signals from the P code and the Y code are matched.

• an 'ionospheric delay' model is stored in the receiver navigation processor. It is changed every 28 days.

• an 'ionospheric delay' model is determined from the satellite Nav message.

On the airborne weather radar display in WX mode, different colours are used:

• to display different intensity of precipitation.

• to display ground height differences.

• to display echoes from other aircraft.

• to display clouds, indicating different levels of visibility.

Performing an ILS approach, you will fly overhead the markers in a specific order. This order is:

• OM, IM (if available), MM.

• OM, MM, IM (if available)

• IM (if available), MM, OM.

• MM, IM (if available), OM.

The frequency which corresponds to a wavelength of 8.25 m is:

• 3.63 MHz

• 363.6 MHz

• 36.36 MHz

• 3636 MHz

Locators are: 1) High powered NDBs used for enroute and airways navigation. 2) Low powered NDBs used for airfield or runway approach. 3) Beacons with a typical range of 10-200 NM. 4) Beacons with a typical range of 10-25 NM. The combination regrouping all the correct statements is:

• 2, 3

• 1, 3

• 1, 4

• 2, 4

How many operational satellites are required for Full Operational Capability (FOC) of the satellite navigation system NAVSTAR GPS?

• 30

• 18

• 12

• 24