Communications And Fans Flashcards
Data link
~significantly decreases tower ffrequency congesttion
~infomartion is made available as text
~eliminates the risk of misunderstandings due to poor vhf voice quality
~can provide worldwide coverage
VHF ,HF, SATCOM
VHF: short range,line of sight need to be,quality high,interferance no
CPDLC (controller pilot data link commuications)
Sends and receives messages relating to operational inofrm,such as update weather or flight inform
ACARS (a/c comubication addressing and reporting system)
Pass telex or a/c messages between the a/c
Satcom is most usesd
ACARS
UPLINK»_space;from ground to the a/c
Downlink» from the a/c to the ground
ACARS
CMU:communications managemtn unit
FMS:flight manegemnt system
CDU:control and display unit
Printer
maintenance computer (diagnostic msgs)
Messages
~free messages
~formatted messages
~metar and taf
~maintenence
~a/c status
MEL list message from maintance can be uplinked to the cockpit
OOOI (out of the gate ,off the ground ,on the ground into the gate)
CNS/ATM
Comunication ,navigation and surveillance air traffic managemnt
The logan
An air ways facilities notification
Three basic contract types
~period
~event
~demand
Periodic contract
~a periodic report can contain any of the ADS-C groups whichi specifies
Event contarct
Specifies an event which proprms the a/c to create and send a report
Evenets reports only contain some of the ads c groups are fixed
Demand contract
~A one off request made by a controller for a report containing only the basic group
~emergency mode:the only contract whihc is establishged from the a/c to the ground station
~can be intiated by flight crew at any time
Fans 2/b
~next generation
Being implemented by boeing (FANS2) and airubus (FANSB)
Faster than ACARS
