EASA090 aviation-communications foundations flashcards
EASA090 aviation-communications foundations · Build recall with a focused review session.
20 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Readback
- Repetition of the required received clearance or instruction elements, enabling the sender to detect a misunderstanding rather than merely acknowledge receipt.
- Hearback
- The sender checking the readback against the issued instruction and correcting any discrepancy before both parties rely on different information.
- ROGER
- A standard acknowledgement of receiving a transmission, distinguished from a yes answer, a promise to comply or a required numerical readback.
- WILCO
- A standard response indicating the message is understood and will be complied with, without replacing any separately required readback.
- UNABLE
- A response explaining that an instruction or request cannot be complied with, allowing clarification or an alternative rather than silent noncompliance.
- Conditional clearance
- An instruction whose action depends on an identified condition that must remain in the readback and be satisfied before that action.
- Callsign
- The station or aircraft identifier used to address the intended recipient and distinguish its instructions from those for another participant.
- Distress
- A condition involving grave and imminent danger requiring immediate assistance, distinguished from an urgency condition that does not meet that description.
- Urgency
- A condition concerning aircraft or personal safety without the distress requirement, communicated using the appropriate urgency signal and useful information.
- MAYDAY
- The aviation radiotelephony distress signal, associated with distress priority rather than used as a routine acknowledgement or weather-information request.
- PAN PAN
- The aviation urgency signal, distinguished from distress and applied according to the actual situation rather than an automatic malfunction label.
- Blind transmission
- A transmission where two-way contact cannot be established but the sender believes the other station may receive, without proving receipt or approval.
- Distress relay
- Passing a distress message on behalf of another station when appropriate, preserving its identity and circumstances rather than presenting oneself as the casualty.
- ATIS
- Automatic Terminal Information Service, providing recurring aerodrome information with an edition identifier rather than an individual aircraft movement clearance.
- VOLMET
- A service broadcasting defined meteorological information to aircraft, distinguished from an air traffic clearance or a transponder interrogation.
- CPDLC
- Controller Pilot Data Link Communications, exchanging defined messages that still require appropriate interpretation and responses under the applicable procedures.
- SELCAL
- A selective-calling facility alerting the intended aircraft through its assigned signalling code rather than continuously displaying other aircraft positions.
- Radio horizon
- The approximate geometry-limited extent of a line-of-sight path in a specified model, not proof of an actual protected service volume.
- Channel spacing
- The separation between allocated communication channels, whose reduction can increase channel capacity without independently extending the physical propagation range.
- Squelch
- Receiver circuitry or control suppressing unwanted noise under its operating conditions, distinguished from transmitter power adjustment or a frequency selector.