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Instruments > Chapter A09 - Communication Systems > Flashcards

Chapter A09 - Communication Systems Flashcards

1
Q

classic Air Traffic Management (ATM) system uses

A

VHF and HF

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2
Q

An Air Traffic Management (ATM) system consists of:

A
  • Communication: Voice Communications
  • Navigation: NAVAIDS
  • Surveillance: Radar
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3
Q

FANS is ?

A

Future Air Navigation System

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4
Q

Pre-FANS, oceanic operations relied only on

A

High Frequency (HF)

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5
Q

The purpose of data-links is to facilitate the ____ and provide a better means of managing it by using text-based (data) ______.

A
  • increase in air traffic
  • messaging
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6
Q

Data-link has a number of advantages:

A
  • Reduced controller workload
  • Reduced frequency congestion as multiple signals can be sent simultaneously
  • Clearances can be printed off, no need to write them down
  • Elimination of misunderstandings due to poor quality signals
  • Worldwide coverage is available
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7
Q

What does ACARs stand for?

A

Aircraft Communications, Addressing and Reporting System

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8
Q

ACARS is a digital data-link system for the transmission of

A

messages between aircraft and ground stations.

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9
Q

Data-link messages:

pre-departure clearance / ATIS / Oceanic clearance but NOT _____

A
  • clearance to Take Off / Land
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10
Q

D-ATIS is an ATIS message

A

received by data-link

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11
Q

What does ACARS stand for ?

A

Aircraft Communications, Addressing and Reporting System

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12
Q

What does CNS stand for ?

A
  • Communication (via data-link)
  • Navigation (using VOR/DME/SATNAV)
  • Surveillance (using primary and secondary (Mode S transponder) radar systems)
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13
Q

What does ATM stand for ?

A

Air Traffic Management

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14
Q

Mode S is ?

A

Datalink

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15
Q

What is FANS

A

Concept using satellite communications and satellite navigation. To allow more aircraft to safely and efficiently utilize a given volume of airspace. FANS routes: need RNP (Required Navigation Performance)

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16
Q

FAN 2 and FANS B is ?

A

ACARS and Aeronautical Telecommunication Network (ATN)

17
Q

ATS Facility Notification (AFN) is the terminology used for

A

logging on to the system.

18
Q

CPDLC - Controller–Pilot Data-link Communications for communications between the

A

pilot and the ATC.

19
Q

ADS - Automatic Dependent Surveillance for

A

automatic exchange of information between the ATC ground systems and aircraft avionics

20
Q

LOG ON must be initiated by the aircraft either automatically or manually and is known as the

A

AFN Contact message

21
Q

LOG ON must be initiated by the aircraft either automatically or manually and is known as the AFN Contact message or FN_CON, what does it do?

A

Informs ATC of the data-link types available on the aircraft, prior to operating data-link with ATC

22
Q

Controller–Pilot Data-Link Communications is?

A

A two-way data-link system by which controllers can transmit strategic messages to aircraft as an alternative to voice comms.

The message is displayed on a flight deck visual display.

23
Q

The main advantages of CPDLC over classic VHF comms are:

A
  • Data is more accurate
  • Ground station can store data direct to the FMS
  • Faster – in terms of the amount of data that can be delivered in one transmission
  • Allows more aircraft / ATC communications per second
  • Can be designed to automatically provide position reports at reporting points
24
Q

Automatic Dependent Surveillance is?

A

A surveillance technique where aircraft automatically provide (via data-link), data derived from on-board NAV & position-fixing systems, including aircraft identification and additional data as appropriate.

25
Q

Two main versions of ADS are currently in use:

A

ADS-B (Broadcast)
ADS-C (Contract)

26
Q

ADS-B (Broadcast) - A function on an aircraft that broadcasts…

A
  • Position
  • Altitude
  • Vector
  • Wind
  • OAT
27
Q

ADS-C (Contract) is?

A

Similar to ADS-B but data is transmitted, based on an explicit contract between ATC and an aircraft

28
Q

ADS-C Contracts are?

A

Periodic - the aircraft assembles and transmits messages at specific time intervals

Event - events (such as altitude change) cause reports to be sent independent of any periodic contracts in effect

Demand - sent each time they are commanded by ATC

Emergency - informs all contracted Ground Stations and switches the communication rate to a higher frequency

29
Q

FANS uses…

In order to fulfill the function of….

A

VHF, HF, SATCOM and digital CPDLC for Communications,

VOR, DME, GNSS and IRS for Navigation, and

Mode S SSR transponders and ADS for Surveillance.

…in order to fulfil the function of : Air Traffic Management

Instruments (35 decks)

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