Practice Test Geeks(DADE) Designated Aircraft Dispatch Examiner Practice Test
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Aircraft Communication Systems Flashcards

7 cards from real DADE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Aircraft Communication Systems flashcards as text

  1. During oceanic operations, when does a dispatcher typically use CPDLC (Controller-Pilot Data Link Communications)?

    Answer: To send and receive ATC clearances and position reports digitally, reducing voice congestion

    CPDLC allows ATC and pilots to exchange messages digitally, reducing frequency congestion and improving accuracy in oceanic and remote airspace.

  2. What is the standard VHF communications frequency band used for air-to-ground aeronautical communications?

    Answer: 118.0–136.975 MHz

    Aeronautical voice communications use VHF frequencies between 118.0 and 136.975 MHz, with 25 kHz or 8.33 kHz channel spacing.

  3. Which of the following best describes the HF communication challenges dispatchers should anticipate on North Atlantic tracks?

    Answer: HF communications may be degraded by ionospheric disturbances, especially during solar events

    HF propagation is subject to ionospheric conditions, and solar activity can cause blackouts or significant signal degradation.

  4. An aircraft transmits an ACARS OUT message. What event does this typically report?

    Answer: Aircraft doors have closed and the aircraft has pushed back from the gate

    ACARS OUT (O) message is generated when the aircraft leaves the gate/pushes back, with doors closed and brakes released.

  5. What is the purpose of the 8.33 kHz channel spacing now required in European airspace?

    Answer: To triple the number of available VHF communication channels in congested airspace

    8.33 kHz channel spacing replaces 25 kHz spacing, tripling available VHF frequencies to reduce congestion in high-density European airspace.

  6. Under Part 121, how frequently must a dispatcher attempt to contact a flight that has not checked in as required?

    Answer: As soon as practical and at intervals specified in the ops specs

    FAR 121.99 and operator ops specs define specific contact requirements; the dispatcher must make contact attempts as specified and document efforts.

  7. What does an ACARS 'IN' message signify?

    Answer: The aircraft has arrived at the gate with parking brake set

    The ACARS IN (I) message in the OOOI sequence is triggered when the aircraft arrives at the gate and sets the parking brake.