Chapter A09 - Communication Systems Flashcards
classic Air Traffic Management (ATM) system uses
VHF and HF
An Air Traffic Management (ATM) system consists of:
- Communication: Voice Communications
- Navigation: NAVAIDS
- Surveillance: Radar
FANS is ?
Future Air Navigation System
Pre-FANS, oceanic operations relied only on
High Frequency (HF)
The purpose of data-links is to facilitate the ____ and provide a better means of managing it by using text-based (data) ______.
- increase in air traffic
- messaging
Data-link has a number of advantages:
- 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
What does ACARs stand for?
Aircraft Communications, Addressing and Reporting System
ACARS is a digital data-link system for the transmission of
messages between aircraft and ground stations.
Data-link messages:
pre-departure clearance / ATIS / Oceanic clearance but NOT _____
- clearance to Take Off / Land
D-ATIS is an ATIS message
received by data-link
What does ACARS stand for ?
Aircraft Communications, Addressing and Reporting System
What does CNS stand for ?
- Communication (via data-link)
- Navigation (using VOR/DME/SATNAV)
- Surveillance (using primary and secondary (Mode S transponder) radar systems)
What does ATM stand for ?
Air Traffic Management
Mode S is ?
Datalink
What is FANS
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)
FAN 2 and FANS B is ?
ACARS and Aeronautical Telecommunication Network (ATN)
ATS Facility Notification (AFN) is the terminology used for
logging on to the system.
CPDLC - Controller–Pilot Data-link Communications for communications between the
pilot and the ATC.
ADS - Automatic Dependent Surveillance for
automatic exchange of information between the ATC ground systems and aircraft avionics
LOG ON must be initiated by the aircraft either automatically or manually and is known as the
AFN Contact message
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?
Informs ATC of the data-link types available on the aircraft, prior to operating data-link with ATC
Controller–Pilot Data-Link Communications is?
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.
The main advantages of CPDLC over classic VHF comms are:
- 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
Automatic Dependent Surveillance is?
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.
