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Originally posted by junglejake
They weren't crazy-low -- about the same height as a typical jet liner. They were black against the sky (it was dusk) and had 3 lights I saw -- one in front, and one at each wingtip. Usually, when a airliner flies overhead, you hear the low rumble of their engines. I didn't hear anything with these guys, though. As stated, they don't run silently, but I suspect more care is taken in making quieter engines than is done with a 747.
It was a while ago, though, so I may have some of my memory wrong