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4 Answers

Cessna Nav I, Nav II, Nav III?

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Aircraft Systems

I thought the the difference between Cessna Nav I, Nav II and  Nav III is just G1000. But I couldn't find the definition of Cessna Nav I, Nav II, Nav III. 

Does anybody have any idea what the difference between Cessna Nav I, Nav II and Nav III?

Thank you. 

4 Answers



  1. Mark Kolber on Jul 05, 2022

    Do you have an example of a Cessna “NAV I” or “NAV II” manual?

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  2. wannaflykr on Jul 05, 2022

    I can find C172 nav I and nav II POH from googling. It has six pack instruments.

    And also I can find nav III POH. It has G1000.

    But I don’t think the difference between nav I, nav II and nav III is only for G1000.

    So I want to know the exact difference between nav I, nav II and nav III.

    Thank you.

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  3. Best Answer


    Jeff Baum on Jul 06, 2022

    The differences are the avionics. Back, long ago, you would see Cessna 172s with “Skyhawk” and “Skyhawks II” on the tail. The Skyhawk had a basic 6 pack instrumentation, a single Nav/Comm and transponder. The Skyhawk II had two Nav/Comms, one with glide slope and a transponder.

    The current Nav I has dual Nav/Comms and a Mode C transponder. The Nav II has one Nav/ Comm, a separate Comm and a KLN 89 GPS, transponder and an autopilot, often the KAP140. The Nav III has the G1000 and either the GFC700 or the KAP140 autopilot.

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  4. wannaflykr on Jul 07, 2022

    Dear Jeff Baum

    I guess you have exact answer.
    I sent an email to TEXTRON. But they said it’s the only difference between nav I, nav II and nav III is G1000.

    You are better than manufacturer.
    I tried to choose you as best answer but I can’t. It’s just resetting. Please somebody tell me how to select as best answer.

    I really appreicate.

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