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Originally Posted by John_Mitchell  I was flying tonight and was worried about the altitude difference between my altimeter and my transponder and couldn't wait to get on land and search JC for this post. Anyway, I was flying tonight and the reported altimeter setting was 30.15 and my altimeter was reading 3,000, but my transponder was reading 2,600. Is this because of the explanations in the previous post...that being that the transponder is reading altitude based on pressure altitude? So, basically, when flying, I should go by my altimeter, not the transponder altitude reading? |
What Merit said. Just the difference between 29.92 and 30.15 is about -230', so I would not worry what your transponder is saying. They almost never agree with the altimeter.