RNAV

Question 1

HF radio waves travel

Answer 1

Daytime + Night time = Sky waves and ground wave

• ground wave range v short

Question 2

Aircraft in RNP 10 ops require

Answer 2

2 LRNSs made up of INS, IRS or GNSS.

Question 3

Scalloping is

Answer 3

an error caused by propagation over uneven terrain, evident by swaying of the needle. called also the bends.

Question 4

The ionospheric model parameters in the nav message are used for

Answer 4

the receiver to calculate the delay of GPS signals passing through ionosphere

Question 5

What GPS receiver is used in aviation?

Answer 5

Multichannel Receiver

Question 6

The doppler VOR

Answer 6

Doppler is used to create a signal received by aircraft’s OVR receiver as a FM signal.

Question 7

Single side band is used

Answer 7

in HF two way comms.

Question 8

GLS vs ILS

Answer 8

GLS allows for more precise navigation within airfield vicinity

Question 9

GBAS corrects for

Answer 9

Satellite clock errors
Ephemeris
Ionospheric propagation

Question 10

GBAS correction info is relayed using what frequency? What is it’s range?

Answer 10

using VHF data link on VOR frequencies 108-118. limited to 30KM.

Question 11

Displacement doubles, DDOM ____?

Answer 11

Doubles too

Question 12

VOR radial takes into account variation at the VOR or the AC

Answer 12

VOR

Question 13

ILS produces what signal

Specify AM or FM

Answer 13

AM radiation pattern 90 and 150Hz.

Question 14

VHF propagation path

Answer 14

space wave

Question 15

UHF propagation path

Answer 15

space wave

Question 16

Max skip distance is given by ____ frequency and _____ ionospheric layer

Answer 16

Higher frequency and Higher ionospheric layer

Question 17

Higher frequency = ____ attenuation

Answer 17

Higher

Question 18

PBN factors

Answer 18

Accuracy
Integrity
Availability
Continuity
Functionality
Resolution

QB : ACCURACY RESOLUTION INTEGRITY

Question 19

Skip distance

Answer 19

distance between transmitter and first sky wave

Question 20

Enhanced Surveillance Mode S EHS

Answer 20

MR TIMS VTG

Magnetic Heading
Roll Angle

True Track Angle
Indicated Airspeed
Mach Number
Selected Altitude

Vertical Rate
Track Angle Rate
Groundspeed

Question 21

Mode S ELS

Answer 21

Identity
Altitude 
Transponder Capability
Status
SI Code

Question 22

Mountain effect is caused by

Answer 22

REFLECTION

Question 23

What frequency band do AWR use

Answer 23

SHF

Question 24

Pulse technique

Answer 24

= radar

Which of the following types of radar equipment operate by means of the pulse technique?

1. Aerodrome Surface Movement Radar
2. Airborne Weather Radar
3. Secondary Surveillance Radar (SSR)
4. Aerodrome Surveillance (approach) Radar

ALL

Question 25

DME identification with collocated VOR

Answer 25

every 40sec on 1350Hz audio freq

Question 26

Radio signal classification (A1A) meaning of signals

Answer 26

A- type of modulation 1- Nature of signal A- Nature of information We need 1st modulation then 2nd signal to get 3rd information

Question 27

GPS augmented by EGNOS, alert time after loss of integrity

Answer 27

6s

Question 28

FM signals on frequencies just below 108MHZ cause ILS to

Answer 28

interfere with localiser leading to erroneous deviation indication

Question 29

cathode AWR severity

Answer 29

green/yellow/red

Question 30

Phase Modulation

Answer 30

Modulation form used in GPS where phase of carrier wave is reversed

Question 31

GALILEO satellites, planes information

Answer 31

3 orbital planes at 56° to the equator

Question 32

AAIM vs RAIM

Answer 32

``` AAIM = ABAS + IRS RAIM = ABAS only ```

Question 33

NDB range depends on

Answer 33

Power output and nature of earth's surface over propagation path

Question 34

NAVSTAR altitude

Answer 34

20200KM

Question 35

GLONASS altitude

Answer 35

19100KM

Question 36

GALILEO altitude

Answer 36

23200KM

Question 37

NAVSTAR planes

Answer 37

6 planes 55° equator

Question 38

GALILEO planes

Answer 38

3 at 56°

Question 39

Fastest satellite system

Answer 39

GLONASS 11:15hrs

Question 40

GALILEO orbital period

Answer 40

14hrs

Question 41

GALILEO satellites

Answer 41

30

Question 42

GLONASS =

Answer 42

Russian

Question 43

GALILEO

Answer 43

European

Question 44

DVOR less sensitive to site errors than CVOR because

Answer 44

large antenna

Question 45

WX+T shows

Answer 45

turbulence within precipitation by detecting doppler shift of reflected radar signals

Question 46

Back beam reverse sensing will occur if

Answer 46

OBI : irrelevant of course | HSI : Back course

Question 47

Most accurate RNAV fixes

Answer 47

DME/DME DME/VOR VOR/VOR IRS

Question 48

PRF =

Answer 48

Pulses per second (not cycles)

Question 49

EGNOS vs GPS

Answer 49

GPS satellites are not geostationary, EGNOS are.

Question 50

Doppler FM or AM

Answer 50

FM

Question 51

GPS receiver can determine AC groundspeed by

Answer 51

Measuring doppler shift

Question 52

Range of a pulse

Answer 52

Range = c / 2PRF

Question 53

GALILEO Clocks

Answer 53

2 different and independent atomic clocks

Question 54

MLS Coverage

Answer 54

40° for 20NM

Question 55

L1 and L2 frequencies help reduce :

Answer 55

Ionospheric Delay

Question 56

What type of signals

Answer 56

weather - 3-5 pencils Map - Fan

Question 57

Max DME Error

Answer 57

1.25% + 0.25NM of distance if before 1989 After 1980 0.1NM

Question 58

Data frames in a NAV message

Answer 58

12.5mins // 25 packs