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4 Answers

Q-route Gulf of Mexico

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General Aviation

Would anyone know if  we are flying the Q-routes in the Gulf of Mexico what type of authorization, if  any , is needed operating under part 91?

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4 Answers



  1. John D Collins on Mar 17, 2018

    See AC No: 90-100A, Change: 2, Dated: 4/14/15: U.S. Terminal and En Route Area Navigation (RNAV) Operations

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  2. Matthew on Mar 17, 2018

    Thanks John.. I took a look there. This AC does not apply to the Q-routes in the Gulf of Mexico.

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  3. John D Collins on Mar 18, 2018

    Why do you claim it does not apply?

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  4. Kris Kortokrax on Mar 19, 2018

    It would help to know what kind of airplane you are using.

    Q routes use airspace from FL 180 – FL 450.
    RVSM airspace runs from FL 290 – FL 410.

    If you are going to fly in RVSM airspace, you need Letter of Authorization B046.
    If you can get permission to climb through RVSM airspace, you do not need it, but it limits your options.

    There may be other LOAs that would aid your operation, such as D095 – Use an MMEL as an MEL.

    You should also have B036, which allows use of multiple Long Range Navigation Systems or B054, which authorizes use of a Single Long Range Navigation System in the Gulf.

    The best thing would be to confer with your FSDO.

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