I have been flying with Skyview for quite some time and while normally I fly in relatively flat terrain (WI and FL) I have taken the plane back and forth across the Appalachians many, many times. Yesterday on my flight across the Apps. I noticed that I was not seeing terrain warning colors (yellow set to appear 300feet below me and red 100ft). I have noticed in the past that they were very accurate and the warning colors appeared when I expected them. This time they did not. In fact, with the Red warning color set to appear at 100 feet below my aircraft, I descended to about 4950 and did not see any colors (600 feet below terrain). The pic below, I had climbed to 5350 ft while next to a 5580ft peak (as depicted on the sectional) and was not seeing any Red or Yellow terrain indications. I was perplexed and surprised. I can only assume that my indicated altitude (baro set auto by Skyview and IFR certified system) was significantly off by GPS altitude? This was VERY alarming to me. I did not check my Indicated GPS altitude. I wish I would have. Next time I will.
Does anyone have any input on this?
Does anyone have any input on this?
