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Systems 3 > Nav Systems > Flashcards

Nav Systems Flashcards

1
Q

What is the basic principle of operation of an NDB

A

NDB transmits a LF or MF signal in all directions which pilots can tune into to obtain a compass bearing to the aid

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2
Q

What are the rough ranges an NDB transmits

A

30 - 400nm

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3
Q

The acronym MINTQC can be used to describe what

A

The factors which affect NDB signal transmission and enduce erros and limit range

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4
Q

What does the acronym stand for

A 
M: mountain effect
I: interference from other transmissions
N: night effect 
T: thunderstorm interference 
Q: quadrantal error
C: costal effects
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5
Q

How many signals does a VOR transmit and what are they

A

2
Reference phase signal
Variable phase signal

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6
Q

On the pc21 one dot on the course deviation marker relates to how much deflection?

A

Half scale which is 5°

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7
Q

Is VOR considered more accurate than NDB

A

Yes

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8
Q

WRT VOR indication errors, whats the acronym which relates

A 
A. airborne equipment errors
V. Vertical polarisation error
G. Ground station error
A. Aggregate error
S. Site effect error
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9
Q

What type of information does a DME provide

A

Distance

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10
Q

DME distance is the straight line distance between aircraft and ground station.
True or false

A

True

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11
Q

What is the main limitation WRT DME

A

Its line of sight only

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12
Q

What is the main function of an ils and what are its subsystems

A

Provide aircraft with info for a precision approach.

Localiser
Glideslope

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13
Q

How many CATs of ILS are there and what are they

A

5

Cat I
Cat II
Cat III A
Cat III B
Cat III C
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14
Q

The tracking tolerance laterally for the pc21 is half scale, how many degrees either side of centre track is this

A

1.25

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15
Q

The tracking tolerance vertically for the pc21 is half scale, how many degrees either side of glideslope is this

A

0.35

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16
Q

What is false glideslope

A

An incorrect signal recieved from the transmitter from unavoidable ground reflections

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17
Q

At approximately what angle would you find both the correct and incorrect glideslopes

A 
False = 12.5°
Correct = 3°
18
Q

What are the 3 basic components of GPS

A

Sapce based
Ground network
Airborne

19
Q

What are the 3 main errors ssociated with GPS signal interference

A

Ionoshpheric effect: severe attenuation of signal
External interference: no line of sight due to masking
Multipath effect: reflection of gps signal

20
Q

What components of the pc21 are considered the navigation brains

A

Fms

Mc

21
Q

Is the pc21 MC approved for IFR flight in aus

A

No

22
Q

How many letter code make up the NDB IDENT

A

2-3

23
Q

What are the 3 types of nav systems on the pc21

A
  • radio nav syst (RNS)
  • gps landing syst sensor unit (GLSSU)
  • Inertial reference system (IRS)
24
Q

What are the nav system related cockpit components

A 
HUD
UFCP
PFD
MFDs
SFD
FMS
25
Q

What powers the tacan, nav 1, nav 2 recievers

A

Tacan = batt bus
Nav 1 = batt bus

Nav 2 = gen 1 bus

26
Q

When the tacan/ dme function is used is in A-G mode what parameters are provided

A

Bearing
Range
Time to go
Ident signal for PFD, UFCP, HUD, MFD

27
Q

When TACAN is in A-A mode, what parameters does it provide

A

Dist to nearest A-A tacan (eg another aircraft)

28
Q

What is the IRS system and what is its main component

A
  • A laser gryo inertial nav system (INS).

- inertial reference unit (IRU)

29
Q

IRU is the primary sensor and supplier of what

A
  • attitude
  • direction
  • acceleration
  • velocities
  • present position (PP)
30
Q

Are there any related power or selector switches in the cockpit for the IRS

A

No

31
Q

What powers the IRU

A

Gen 1 bus

Batt bus

32
Q

What systems does the IRS recieve inputs from

A
  • Air data computer (ADC)
  • MC
  • GLSSU
  • FMS
33
Q

What IRS data is displayed on PFD

A 
Attitude
Slip
Rate of turn
Heading
Wind
Gs
G load
34
Q

How many GLSSUs does the pc21 have. And where are they located

A
  1. Avionics bay
35
Q

Where are both the GLSSU units powered from

A 
1 = batt bus
2 = gen 1 bus
36
Q

What components in the avionics bay does the RNS consist of

A

Nav 1 & 2 recievers

TACAN/ DME transceiver

37
Q

How long does an aircraft take to align if on the ground and does this happen automatically on power up

A

5-17 mins

Yes

38
Q

What are the 3 HSI modes

A

Basic compass mode
CDI
Map

39
Q

The hud gives nav enroute and approach symbology. What info is displayed on the hud

A

Selected Nav source
TTG
Distance to DME station

40
Q

What else is shown on the hud when correct ils frequency is selected

A

Localizer aids
Glideslope indications
Flight director (FD) box
Excessive deviation arrows

Systems 3 (9 decks)

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