iFly GPS Forum

What are the vertical grey bars shown in the attached pictures? I've noticed them a few times, but this is the first time I've had a camera handy in the plane. They apear to change spacing over a period of about 10-15 seconds, and if I change heading, they will tend to expand if contracting, and contract if expanding.... They also show up horizontally with the same characteristics, although I only have photos of the vertical bars.....

Interesting. And the lines are clearly moving around as you pan/zoom. I've seen this before with a flight plan that wraps the world - tiny scale calculations become miles different and so the lines seem to randomly move around just like these are. I suspect if you were to do a lot of panning up or down you would eventually find the original source of the shape responsible for these. Do you have an ADSB device? I'd suspect the nexrad radar image that was download had some corrupt data. If so, after 5 minutes or so a new image would stream down and the lines would go away.

-Walter

Okay, I saw similar phantom lines during my flight from Houston to Dallas yesterday...but I saw them when I pulled up the airport diagram (while still enroute), and they weren't vertical. There were two lines, very close together, running from around the middle of the left side toward the upper left corner. They were moving pretty quickly, and within a few seconds had drifted off the top of the screen and I never saw them again. I think they were on the screen for a total of about 10-15 sec or so.

I did not see them (or at least I did not notice them!) in the sectional or weather mode views that I was switching between at the time.