You may know that the new digital Garmin transponder is being offered for new orders. You may not know that it offers a digital read-out of your altitude. The big question is whether or not this could function as a back-up altimeter.
In Barry Schiff’s June article in AOPA Pilot points out that there is no satisfactory back-up for your altimeter. However, if the new Garmin unit has an independent blind encoder, it may be able to read out the altitude despite loss of your altimeter. Does anyone have the answer?