Test 120 exam questions on Radio Navigation for ATPL

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1 - In ISA conditions, approximately what is the maximum theoretical range at which an aircraft at FL210 may expect to receive signals from a VOR facility sited 340 feet above mean sea level? 245 NM 204 NM 183 NM 352

2 - Which one of the following inputs to an Area Navigation System (R-NAV) comes from an external, not on-board, system? Inertial Navigation System (INS) position Magnetic heading Pressure altitude VOR/DME radial/distance

3 - A TCAS II equipped a/c will have mode S because: The data link is required to transmit relative position Mode S transmits a 3D position The datalink is required to co-ordinate evasive manoeuvres True altitude is obtained from mode S

4 - How does the Electronic Flight Instrument System display of a B737-400 respond to the failure of a VHF navigation (VOR) receiver? The pointer rotates around the display and a VOR 1 or 2 failure warning bar appears It removes the associated magenta deviation bar and/or pointer from the display The pointer flashes and a VOR 1 or 2 failure warning bar appears The deviation bar and/or pointer change colour to red and flash intermittently

5 - ICAO recommendations are that range errors indicated by Distance Measuring Equipment (DME) should not exceed: + or - 0.5 NM or 3% of the distance measured whichever is the greater + or - 0.25 NM plus 1.25% of the distance measured + or - 0.25 NM plus 3% of the distance measured up to a maximum of 5 NM + or - 1.25 NM plus 0.25% of the distance measured

6 - GPS system satellites transmit their signals on two carrier waves 1575 MHz and 1227 MHz and supply two possible codes accessible according to user (civil or military).Commercial aviation is now able to use: Only the 1575 MHz carrier wave and two codes Only the 1227 MHz carrier wave and one code The two carrier waves and one public code SHF

7 - Given:Magnetic heading 280°VOR radial 090°What bearing should be selected on the omni-bearing selector in order to centralise the VOR deviation needle with a 'TO' indication? 270° 090° 100° Stop the loop rotation

8 - According to ICAO Annex 10, in which frequency band(s) does a locator normally transmit? MF/HF HF LF/MF HF/VHF

9 - Considering a primary radar system, what kind of aerials are used? A directional antenna for transmitting, and an omni-directional antenna for receiving. One directional antenna for transmitting and one for receiving. One directional antenna both for transmitting and for receiving. Multichannel

10 - In order to plot a bearing from a VOR station, a pilot needs to know the magnetic variation: At the half-way point between the aircraft and the station At the aircraft location At both the VOR and aircraft 300

11 - Which of the following is one of the functions of the Computer in a basic RNAV system? It transfers the information given by a VOR/DME station into tracking and distance indications to any chosen Phantom Station/waypoint It calculates cross track information for NDB approaches It automatically selects the two strongest transmitters for the Area-Nav-Mode and continues working by memory in case one of the two necessary station goes off the air VOR/DME Area Navigation computer is receiving neither radial nor distance data information from VOR/DME stations.

12 - Which one of the statements below is correct regarding the DME? The DME operating frequencies are in the UHF frequency band. The DME ground station is always co-located with a VOR station. The indicated distance is the ground distance measured from the aircraft's projected position on the ground to the DME ground installation. Two lines of position obtained from two different DME's give an unambiguous fix.

13 - The DME (Distance Measuring Equipment) operates within the following frequencies: 329 to 335 MHz 108 to 118 MHz 962 to 1213 kHz. Greater detail can be obtained at the more distant ranges of the smaller water droplets

14 - Which of the figures depicts an Electronic Flight Instrument System (EFIS) display in FULL VOR/ILS mode with an VOR frequency selected?

Figure 1 Figure 6 Figure 5 Radio communication failure

15 - Which of the following is a complete list of airborne weather radar antenna stabilisation axes? Roll and pitch Roll and yaw Pitch and yaw (i) 25 (ii) 17

16 - A weather radar, set to the 100 NM scale, shows a squall at 50 NM.By changing the scale to 50 NM, the return on the radar screen should: Decrease in area but not change in position on the screen Increase in area and appear nearer to the bottom of the screen Decrease in area and move to the top of the screen Increase in area and move to the top of the screen

17 - What is the approximate angular coverage of reliable navigation information for a 3° ILS glide path out to a minimum distance of 10 NM? 0.45° above the horizontal to 1.75° above the glide path and 8° each side of the localiser centreline 1.35° above the horizontal to 5.25° above the horizontal and 8° each side of the localiser centreline 3° above and below the glide path and 10° each side of the localiser centreline 0.7° above and below the glide path and 2.5° each side of the localiser centreline

18 - The operating principle of a DME is the measurement of the: Frequency change between the emitted wave and reflected wave Frequency of the reflected wave Time between the transmission and reception of radio pulses 190 NM

19 - Given:W/V (T) 230/20 KT, Var. 6E,TAS 80 KTWhat relative bearing from an NDB should be maintained in order to achieve an outbound course of 257°(M) from overhead the beacon? 172 008 188 352

20 - In relation to the satellite navigation system NAVSTAR/GPS, the term 'inclination' denotes the angle between the: Horizontal plane at the location of the receiver and the direct line to a satellite Orbital plane and the equatorial plane Horizontal plane at the location of the receiver and the orbital plane of a satellite It varies, depending on the time and observer's location

21 - The selection of code 7600 on an aircraft SSR transponder indicates: An emergency Radio communication failure Transponder malfunction 6.8 km

22 - Which of the following errors is associated with the use of VOR? Coastal refraction. Scalloping. Night effect. Quadrantal error.

23 - An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090°. The tail of the VOR pointer shows 135°. The available information from the VOR is: Radial 135°, relative bearing unknown Radial 315°, relative bearing unknown Radial unknown, relative bearing 045° Local thunderstorm activity

24 - An OBS is set to 048 with a TO flag showing. The VOR deviation bar is showing almost full right deflection. Approximately what radial are you on? 038 058 238 218

25 - On an ILS approach, the glidepath needle is fully down. How much deflection does this indicate? 0.7° 5° 10° 2.5°

26 - In which frequency band does the Microwave Landing System (MLS) operate? EHF VHF SHF UHF

27 - The middle marker transmits on: 75MHz 1300Hz 75Hz 1300MHz

28 - Almanac data stored in the receiver of the satellite navigation system NAVSTAR/GPS is used for the: Recognition whether Selective Availability (SA) is operative Fast identification of received signals coming from visible satellites Correction of receiver clock error 300°(M)

29 - In which frequency band do VOR transmitters operate? SHF UHF EHF For position fixing they are all based on the WGS84 ellipsoid

30 - A MLS without DME-P provides: An ILS-like approach A staged approach but not with a curved path A category 3 approach An approach with a curved path but not staged

31 - A typical frequency employed in Distance Measuring Equipment (DME) is: 100 MHz 10 MHz 100 GHz SHF band and uses frequency modulation techniques

32 - An aircraft passes overhead a DME station at 12000 feet above the station. At that time, the DME reading will be: 0 NM. Approximately 2 NM. Fluctuating and not significant. Interference from other NDBs, particularly at night

33 - Assuming a five dot display on either side of the ILS localiser cockpit display, what is the angular displacement of the aircraft from the localiser centreline when the CDI is deflected 2 dots to the right? 2.0° to the right. 2.0° to the left. 1.0° to the right. 1.0° to the left.

34 - What are the effects, if any, of shadowing by parts of the aircraft (e.g. wing) on the reception of signals from NAVSTAR/GPS satellites? The signals will be distorted, however the error can be corrected for using an algorithm and information from unaffected signals It causes multipath propagation It has no influence because high frequency signals are unaffected It checks the ground station accuracy using a built-in test programme

35 - What is the value of the track from TBX to YTB?

170°(M) 140°(M) 097°(T) 670 fpm

36 - What does ADF stand for? Airborne Direction Finding Aeroplane Direction Finding Airport Direction Finder UHF

37 - Factors liable to affect most NDB/ADF system performance and reliability include: Static interference - night effect - absence of failure warning system Coastal refraction - lane slip - mountain effect Height error - station interference - mountain effect Static interference - station interference - latitude error

38 - What is a VDF referenced to? Magnetic north at the aircraft True north at the aircraft Magnetic north at the station Relative bearing to the aircraft

39 - A radio beacon has an operational range of 10 NM. By what factor should the transmitter power be increased in order to achieve an operational range of 20 NM? Eight Six Two Four

40 - What is the minimum number of satellites required for the NAVSTAR/GPS to carry out two dimensional operation? 5 3 2 4

41 - The principle of operation of an ILS localiser transmitter is based on two overlapping lobes that are transmitted on (i).......... frequencies and carry different (ii).......... (i) different (ii) modulation frequencies (i) the same (ii) phases (i) different (ii) phases 095

42 - The orbital planes of the satellite navigation system NAVSTAR/GPS are: Inclined 90° to the equatorial plane Inclined 55° to the earth axis Parallel to the equatorial plane The deviation bar and/or pointer change colour to red and flash intermittently

43 - In which mode of operation does the aircraft weather radar use a cosecant squared radiation pattern. WEATHER CONTOUR MANUAL Fixed ground stations compute position errors and transmit correction data to a suitable receiver on the aircraft

44 - What is the heading bug selected to?

272°(M) 260°(M) 300°(M) FL50

45 - How does a NAVSTAR/GPS satellite navigation system receiver recognise which of the received signals belongs to which satellite? Each satellite transmits its signal, on common frequencies, with an individual Pseudo Random Noise code Each satellite transmits its signal on a separate frequency The receiver detects the direction from which the signals are received and compares this information with the calculated positions of the satellites True airspeed

46 - What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt? 600 FT/MIN 950 FT/MIN 800 FT/MIN 0.7° above and below the glide path and 2.5° each side of the localiser centreline

47 - The Flight Management System (FMS) is organised in such a way that the pilot can: Modify the database every 14 days Modify the data in the database between two updates Read and write at any time in the database 400 FT/MIN

48 - A VOR and an NDB are co-located. An aircraft equipped with an RMI is flying away from the beacons on a radial of 090° through an area where magnetic variation is changing rapidly. Which statement is correct? Neither the VOR or the NDB needles move The ADF needle moves, the VOR needle does not The VOR needle moves, the ADF needle does not Both VOR and ADF needles move

49 - In weather radar the use of a cosecant squared beam in 'Mapping' mode enables: Better reception of echos on contrasting terrain such as ground to sea A greater radar range to be achieved Scanning of a large ground zone producing echos whose signals are practically independent of distance (48°50'N , 006°22'W)

50 - The Flight Management System (FMS) is organised in such a way that: The pilot is able to modify the navigation database in the FMC between two updates. The navigation database of the FMC is valid for one year. The navigation database is read only to the pilot. Timing the period that is taken for a transmission from the aircraft's transmitter/receiver to reach and return from a satellite in a known position

51 - The reason why pre take-off holding areas are sometimes further from the active runway when ILS Category 2 and 3 landing procedures are in progress than during good weather operations is: Heavy precipitation may disturb guidance signals Aircraft manoeuvring near the runway may disturb guidance signals To increase aircraft separation in very reduced visibility conditions 156 NM

52 - Full deflection on a glide slope indicator indicates that the aircraft is: 2.5° above or below the correct glide path. 0.5° above or below the correct glide path. 0.7° above or below the correct glide path. 1.0° to the left.

53 - A VOR and an ADF are co-located. In NIL wind conditions you cross the VOR radial of 240 on a heading of 360°(M). In the vicinity of the station you should read an ADF bearing of: 240 060 120 300

54 - An aircraft is on radial 120 with a magnetic heading of 300°, the track selector (OBS) reads:330. The indications on the Course Deviation Indicator (CDI) are 'fly': Left with 'TO' showing Left with 'FROM' showing Right with 'FROM' showing 180°

55 - The influence of the ionosphere on the accuracy of the satellite navigation system NAVSTAR/GPS is: Minimised by computing the average of all signals Only significant if the satellites are located at a small elevation angle above the horizon Minimised by the receiver using a model of the atmosphere and comparing signals transmitted by the satellites Detect the larger water droplets

56 - In relation to radar systems that use pulse technology, the term 'Pulse Recurrence Rate (PRR)' signifies the: The number of cycles per second Delay after which the process re-starts Ratio of pulse period to pulse width UHF

57 - In relation to Area Navigation Systems (RNAV), which of the following is an Air Data input? VOR/DME radial/distance Inertial Navigation System (INS) position Doppler drift 760

58 - Which of the following statements concerning the L1 and L2 NAVSTAR/GPS transmission frequencies and codes is correct? The higher frequency is only used to transmit the P code C/A and P codes are transmitted at different times on both frequencies The lower frequency is used to transmit both the C/A and P codes The higher frequency is used to transmit both the C/A and P codes

59 - The two signals transmitted by a conventional VOR ground station are 90° out of phase on magnetic: South West East Slant range.

60 - The aircraft DME receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogations because: Pulse pairs are amplitude modulated with the aircraft registration Aircraft interrogation signals and transponder responses are 63 MHz removed from each other The time interval between pulse pairs is unique to that particular aircraft ± 8.0nm for 95% of the flight time.

61 - Which of the following lists are all errors that affect the accuracy and reliability of the Satellite-Assisted Navigation system (GNSS/GPS)? Satellite mutual interference Satellite ephemeris Atmospheric propagation Global Positioning System (GPS)

62 - A ground radar transmitting at a PRF of 1200 pulses/second will have a maximum unambiguous range of approximately: 135 NM 67 NM 27 NM 400 FT/MIN

63 - DME channels utilise frequencies of approximately: 1000 MHz 600 MHz 300 MHz The closer the receiver is to a LAAS ground reference station, the more accurate is the aircraft position fix.

64 - In a primary radar using pulse technique, pulse recurrence frequency (PRF)/pulse recurrence rate (PRR) determines: Target discrimination Minimum range Maximum theoretical range 280°

65 - In a Satellite-Assisted Navigation system (GNSS/GPS) a position line is obtained by: The aircraft's receiver measuring the phase angle of the signal received from a satellite in a known position Timing the period that is taken for a satellite's transmission to reach the aircraft's receiver The aircraft's receiver measuring the time difference between signals received from a minimum number of satellites 200 FT

66 - Basic RNAV requires a track-keeping accuracy of: +/- 3NM or better for 90% of the flight time +/- 5NM or better for 95% of the flight time +/- 5NM or better throughout the flight 1090 +/- 0.3 MHz

67 - In the Flight Management Computer (FMC) of the Flight Management System (FMS), data relating to STARs and SIDs is stored in the: Performance database Air data computer Auto flight computers Roll, pitch and yaw

68 - If the reference phase differs 30° with the variable phase the radial from the VOR station will be: 330° 210° 030° 150°

69 - There are two NDBs, one 20 NM inland, and the other 50 NM inland from the coast.Assuming that the error caused by coastal refraction is the same for both propagations, the extent of the error in a position line plotted by an aircraft that is over water will be: Greater from the beacon that is 50 NM inland The same from both beacons when the aircraft is on a relative bearing of 090° and 270° Greater from the beacon that is 20 NM inland The same from both beacons when the aircraft is on a relative bearing of 180° and 360°

70 - How long does it take a NAVSTAR/GPS satellite to orbit the earth? Approximately 24 hours (one sidereal day) Approximately 12 hours (1/2 of a sidereal day) 365 days because the satellites are located in a geostationary orbit The nearer a receiver is situated to a D-GPS ground station, the more accurate the position fix

71 - In accordance with Doc 8168, a pilot flying an NDB approach must achieve a tracking accuracy within ........ of the published approach track. +/-10° +/-2.5° +/-5° +/-2°

72 - Which of the following equipments works on the interrogation/response principle? Secondary Surveillance Radar (SSR) Aerodrome Surface Movement Radar Airborne Weather Radar (AWR) + or - 1.25 NM plus 0.25% of the distance measured

73 - The indicated range from a DME station is: 0 when passing overhead the station. Ground range. Ground range only if the beacon is co-located with VOR. Slant range.

74 - Given:Aircraft heading 160°(M),Aircraft is on radial 240° from a VOR, Selected course on HSI is 250°.The HSI indications are deviation bar: Behind the aeroplane symbol with the FROM flag showing Ahead of the aeroplane symbol with the TO flag showing Ahead of the aeroplane symbol with the FROM flag showing 360°

75 - At what approximate height above the WGS-84 ellipsoid are NAVSTAR/GPS satellites circling the earth? 10900 km 20200 km 19500 km 18

76 - In which frequency band does an ILS glide slope transmit? SHF VHF EHF UHF

77 - The pencil shaped beam of an airborne weather radar is used in preference to the mapping mode for the determination of ground features: Beyond 50 to 60 NM because more power can be concentrated in the narrower beam When approaching coast-lines in polar regions Beyond 150 NM because the wider beam gives better definition 1030 MHz 1030 MHz

78 - In the NAVSTAR/GPS satellite navigation system, receiver clock error: Is the biggest part of the total error It cannot be corrected Can be minimised by synchronisation of the receiver clock with the satellite clocks Is corrected by using signals from four satellites

79 - The geometric shape of the reference system for the satellite navigation system NAVSTAR/GPS, defined as WGS 84, is: A mathematical model that describes the exact shape of the earth A sphere An ellipsoid Only the 1575 MHz carrier wave and one code

80 - The receiver aerial for a NAVSTAR/GPS system should be mounted: In the vicinity of the receiver to avoid long transmission lines Inside the tail fin to minimise the influence of reflections from the wing and fuselage Under the fuselage in order to receive correction data transmitted by D-GPS stations Only the 1575 MHz carrier wave and one code

81 - Given: Course Deviation Indicator (CDI) for a VOR is selected to 090°. From/To indicator indicates 'TO'.CDI needle is deflected halfway to the right. On what radial is the aircraft? 085 265 275 L2-coarse acquisition (C/A)

82 - Which one of the following errors can be compensated for by a NAVSTAR/GPS receiver comparing L1 and L2 frequencies? Tropospheric Multipath Receiver noise 4

83 - Which facility associated with the ILS may be identified by a two-letter identification group? Locator. Glide path. Outer marker. "Request QDR".

84 - In which frequency band do Satellite-Assisted Navigation systems (GNSS/GPS) provide position information that is available to civil aircraft? UHF VHF EHF Continuous automatic position reporting using Global Positioning System (GPS) satellites and collision avoidance using TCAS II

85 - In the Flight Management Computer (FMC) of the Flight Management System (FMS), data relating to waypoints is stored in the: Navigation database Auto flight computers Performance database Continuous automatic position reporting using Global Positioning System (GPS) satellites and collision avoidance using TCAS II

86 - Which of the following NAVSTAR/GPS satellite navigation system codes can be processed by 'unauthorised' civil aviation receivers? P C/A P and Y Right of the localizer and below the glidepath

87 - Which of the following affects VDF range? The height of the transmitter and of the receiver. Strength of the pilot's voice when transmitting. Sky wave propagation. Monitor the orbital planes of the satellites

88 - What is the "Q" code for a magnetic bearing from a VDF station? "Request QTE". "Request QNH". "Request QDM". "Request QDR".

89 - Which of the following combinations of satellite navigation systems provide the most accurate position fixes in air navigation? NNSS-Transit and GLONASS GLONASS and COSPAS-SARSAT NAVSTAR/GPS and NNSS-Transit 260°(M)

90 - Which of the following is correct regarding the range of an NDB? Aircraft height is not limiting for the reception of signals from the N The transmitter power of the NDB station has no effect on the range. The range of an NDB will most likely increase at day time compared to night time. The range is limited to the line of sight.

91 - A VOR is sited at position A (45°00'N, 010°00'E). An aircraft is located at position B (44°00'N, 010°00'E). Assuming that the magnetic variation at A is 10°W and at B is 15°W, the aircraft is on VOR radial: 195° 185° 190° 020°

92 - In which situation will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL400? When overhead the station, with no change of heading at transit When passing abeam the station and within 5 NM of it When tracking directly away from the station at a range of 10 NM An ADF sited on the flight route

93 - The distance between a NAVSTAR/GPS satellite and receiver is: Determined by the time taken for the signal to arrive from the satellite multiplied by the speed of light Determined by the phase shift of the Pseudo Random Noise code multiplied by the speed of light Calculated, using the WGS-84 reference system, from the known positions of the satellite and the receiver 4

94 - Which of the following lists information required to input a waypoint or 'Phantom Station' into a basic VOR/DME-based Area Navigation System? Magnetic track and distance from the aircraft to the waypoint or 'Phantom Station' Magnetic track and distance to a VOR/DME from the waypoint or 'Phantom Station' Radial and distance from a VOR/DME to the waypoint or 'Phantom Station' Beam width

95 - Which one of the following is an advantage of a Microwave Landing System (MLS) compared with an Instrument Landing System (ILS)? It does not require a separate azimuth (localiser) and elevation (azimuth) transmitter It is insensitive to geographical site and can be installed at sites where it is not possible to use an ILS There is no restriction on the number of ground installations that can be operated because there is an unlimited number of frequency channels available 190 NM

96 - You are on a magnetic heading of 055° and your ADF indicates a relative bearing of 325°. The QDM is: 200° 235° 055° 020°

97 - Which of the following satellite navigation systems has Full Operational Capability (FOC) and is approved for specified flights under IFR conditions in Europe? COSPAS-SARSAT NNSS-Transit GLONASS Satellite to ground time lag

98 - Your aircraft is heading 075°M. The OBI is set to 025°. The VOR indications are 'TO' with the needle showing right deflection. Relative to the stations, you are situated in a quadrant defined by the radials: 025° and 115° 295° and 025° 115° and 205° 2.5°

99 - Which of the figures depicts an Electronic Flight Instrument System (EFIS) display in Expanded (EXP) VOR/ILS mode with an VOR frequency selected?

Figure 4 Figure 1 Figure 6 Figure 5

100 - In ISA conditions, what is the maximum theoretical range at which an aircraft at FL80 can expect to obtain bearings from a ground VDF facility sited 325' above MSL? 158 NM 134 NM 114 NM 107 NM

101 - Under CS-25 colour code rules for Electronic Flight Instrument Systems (EFIS), increasing intensity of precipitation are coloured in the order: Green, amber/yellow, red, magenta Amber/yellow, magenta, black Black, amber/yellow, magenta, red Multi-sensor systems are not certificated for flights under IFR conditions

102 - An airway 10 NM wide is to be defined by two VORs each having a resultant bearing accuracy of plus or minus 5.5°.In order to ensure accurate track guidance within the airway limits the maximum distance apart for the transmitter is approximately: 50 NM 105 NM 210 NM Only permitted with certain precautions, to safeguard health of personnel and to protect equipment

103 - You are on a compass heading of 090° on the 255 radial from a VOR. You set the course 190° on your OBS. The deviation bar will show: Full scale deflection right with a 'from' indication Full scale deflection left with a 'to' indication Full scale deflection left with a 'from' indication Coastal refraction.

104 - The maximum pulse repetition frequency (PRF) that can be used by a primary radar facility in order to detect targets unambiguously at a range of 50 NM is:(pps = pulses per second) 610 pps 3240 pps 713 pps 330 NM

105 - Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings? Quadrantal error Coastal effect Precipitation interference Skywave distortion of the null position and is maximum at dawn and dusk

106 - What information may be displayed on an ATC radar screen connected only to a primary radar system? Aircraft position and SSR code. Aircraft position, SSR code and altitude. Aircraft position only. Aircraft altitude.

107 - In what type of nominal orbit are NAVSTAR GPS satellites placed? Elliptical Geo-stationary Circular Height based on QFE

108 - Which one is the most correct statement regarding the range of the DME system? Operates on the principle of phase comparison Operates on VHF Has unlimited range due to ground wave propagation The range is limited to the line of sight.

109 - In relation to the satellite navigation system NAVSTAR/GPS, which of the following statements correctly describes the term 'Pseudo Random Noise (PRN)' signal? PRN is the atmospheric jamming that affects the signals transmitted by the satellites PRN describes the continuous electro-magnetic background noise that exists in space PRN is a code used for the identification of the satellites and the measurement of the time taken by the signal to reach the receiver PRN occurs in the receiver. It is caused by the signal from one satellite being received from different directions (multipath effect)

110 - A Cat III ILS glidepath transmitter provides reliable guidance information down to: A maximum height of 200 ft above the runway The surface of the runway A maximum height of 50 ft above the runway Local thunderstorm activity

111 - Assuming sufficient transmission power, the maximum range of a ground radar with a pulse repetition frequency of 450 pulses per second is: (Given: velocity of light is 300 000 km/s) 333 km 150 km 1333 km 666 km

112 - An aircraft is flying on the true track 090° towards a VOR station located near the equator where the magnetic variation is 15°E. The variation at the aircraft position is 8°E.The aircraft is on VOR radial: 278° 262° 255° 285°

113 - The ISO-ECHO facility of an airborne weather radar is provided in order to: Give an indication of cloud tops Detect areas of possible severe turbulence in cloud Extend the mapping range 666 km

114 - An aircraft is flying a 3° glidepath and experiences a reduction in groundspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately: 50 FT/MIN 250 FT/MIN 100 FT/MIN 150 FT/MIN

115 - The different segments of the satellite navigation system NAVSTAR/GPS are the: Control, space and user Atomic clock, power supply and transponder Antenna, the receiver and the central control unit (CDU) L2-coarse acquisition (C/A)

116 - The main task of the user segment (receiver) of the satellite navigation system NAVSTAR/GPS is to: Transmit signals which, from the time taken, are used to determine the distance to the satellite To monitor the status of the satellites, determine their positions and to measure the time Select appropriate satellites automatically, to track the signals and to measure the time taken by signals from the satellites to reach the receiver WGS 84

117 - The BFO selector on an ADF receiver is used to: Hear the IDENT of some NDB stations radiating a continuous wave signal Find the loop 'null' position Hear the IDENT and must always be switched ON The GNSS can be used to update the FMS position from a drifting IRS.

118 - Which one of the following methods is used by a Microwave Landing System (MLS) to indicate distance from the runway threshold? Timing the interval between the transmission and reception of primary radar pulses from the aircraft to MLS station Measurement of the frequency shift between the MLS azimuth and elevation transmissions A precision facility DME + or - 50° of the runway centre-line

119 - Precision RNAV (P-RNAV) requires a track-keeping accuracy of: ± 10.0nm for 95% of the flight time. ± 5.0nm for 95% of the flight time. ± 1.0nm for 95% of the flight time. 1300MHz

120 - In an Electronic Flight Instrument System (EFIS) data relating primarily to navigation in the FMC is provided by: Inertial Reference Systems, Aircraft Weather Radar, Navigation radios Navigation radios, GPS, Inertial Reference Systems Inertial Reference Systems, Navigation radios, Terrain Collision Alerting System Beam width

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