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An aircraft is fitted with a multimode receiver (MMR) with a single control panel for use with ILS, MLS and GNSS approaches. What is an advantage of this over individual systems for each approach type?

  • A

    An approach can be flown using the combined signals of all three systems.

  • B

    The crew need NOT know which type of approach is being flown.

  • C

    The approach can be flown more accurately.

  • D

    Reduces training requirements.

Learning Objective 062.02.06.02.04: Explain why aircraft are equipped with a multimode receiver (MMR) in order to be able to receive ILS, MLS and GPS.

Multimode receivers are useful for saving space in the cockpit, reducing the need for multiple separate systems. Of course, this also simplifies the job for the pilots, who do not need extra training for each different receiver and control panel, but instead are just trained to use one, thereby making different approaches a very similar procedure, and giving the pilots better currency on all types of approach.

MLS approaches are extremely rare (if not completely extinct) these days, but making GNSS approaches and ILS approaches a similar procedure to set up is good for currency, training and safety.

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