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Suppose we are in HDG mode.

Trivially, we may visually judge which leg we on the victor airway and activate that leg.

However, in real-world, I found sometimes the fixes are so close and the airplane is relatively far from the airways. It is difficult to tell exactly which leg I am going to intercept, without "ruler" assistance. Meanwhile, ATC may change HDG assignments, and therefore the intercepted leg may change.

Is there a way to "activate the nearest leg and intercept" in G1000? or how would you solve this problem other ways?

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  • $\begingroup$ Why not maintain HDG mode until intercepting the airway? $\endgroup$ – DeltaLima Dec 19 '15 at 14:52
  • $\begingroup$ In G1000, the airway is segmented by fixes and we are intercepting a leg instead of the airway. $\endgroup$ – skyoasis Dec 19 '15 at 22:19
  • $\begingroup$ Are you in command of the aircraft or is the G1000? $\endgroup$ – DeltaLima Dec 19 '15 at 22:20
  • $\begingroup$ Ultimately, it is me who commands the airplane, but my question is it possible to program my intention in advance and ensure the FMS matches the airplane's state throughout the whole process. $\endgroup$ – skyoasis Dec 19 '15 at 23:30
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If the airway is too far away to accurately determine which leg you are going to intercept, why would you let the G1000 pick the leg you are going to intercept?

You know best what you want and, as you say, ATC may change your heading anyway.

So you shouldn't intercept automatically until you are fairly sure where you are intercepting. Instead you remain in HDG mode which gives you full control and makes it easy when ATC instructs you to change heading. Then when you are a couple of miles from intercepting you select the leg and let the G1000 do the magic if you want to.

Automation is there to relieve you from difficult or boring tasks. If you find that you spend a lot of time programming your FMS, it may be better to reduce the level of automation and spend the extra time on situational awareness.

I recommend watching this America Airlines training video on automation dependency (a.k.a. "Children of the magenta line"). It addresses the FMS / autoflight dependecies for airline pilots. The video is over 15 years old and by now similar automation systems have entered the cockpits of small aircraft. Although some aspects of the video address a multicrew environment, the main points are equally valid for G1000 equipped single crew / single engine propeller aircraft.

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