Capt.Doug writes:

They are both important, however altitude leeway is +/-300' whereas airways
have .5 to 4 miles of leeway.

Three hundred feet seems generous for altitudes. I thought I read
somewhere that I was supposed to be within 100 feet, or was it 60
feet? Now I can't seem to find a specific tolerance in the FARs. Of
course this isn't normally a problem if I'm on autopilot, but when
flying by hand I still have trouble holding an altitude.

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