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I’m currently planning an instrument flight which includes a full stop at an airport with a RNAV (Obstacle) Departure Procedure.

The procedure plate requires RNAV 1 and GPS.

In ground school I remember learning that a FD is required when flying a RNAV 1 approach. My airplane is a Cessna 172S that has WAAS but no AP/FD.

When looking up the FAA AC 90-100A it talks about the FD but also mentions a “lateral deviation indicator” which would be my pink needles when loading the DP in my G1000. The full sentences reads as follows:

(2) Pilots must use a lateral deviation indicator (or equivalent navigation map display), flight director and/or autopilot in lateral navigation mode on RNAV 1 routes. The full-scale course deviation indicator (CDI) deflection value of ±1 NM is acceptable.

Can I now fly this RNAV DP with my WAAS C172S which is not equipped with an AP/FD or not?

It's a 2009 C172S G1000/G with PBN C2D2 but not equipped with any AP/FD. The approach plate in question is the ATASY2.ATASY Departure out of KTDO.

ATASY2.ATASY Departure
Click to view

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  • $\begingroup$ What does the AC say about FD? You wrote "it talks about the FD". $\endgroup$
    – ymb1
    Sep 16 at 15:01
  • $\begingroup$ The AC only mentions the part that I quoted regarding a lateral deviation indicator, flight director and/or autopilot in lateral navigation mode. $\endgroup$
    – FlyPNW
    Sep 16 at 15:26
  • $\begingroup$ Please let me know precisely the equipment aboard your Cessna 172 and the departure plate in question $\endgroup$ Sep 16 at 19:56
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    $\begingroup$ The answer is right there in your quote from the AC. Are you having trouble parsing the “and/or”? $\endgroup$
    – StephenS
    Sep 16 at 23:11
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    $\begingroup$ As @StephenS indicates, my reading would be: you can use a lateral deviation indicator (CDI), or a flight director, or an autopilot in lateral mode, or any combination. $\endgroup$
    – Orienteer
    Sep 17 at 13:51

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