While taking my boat out of the water about half an hour ago, I observed a 737-700 (or -300 with winglets) fly by at about 1000 feet, as if it were going into MYR. But when I checked flightaware, nothing was going in there except a DL CRJ200 and G4 MD82. Then when I got back to my house, it came over, again very low, at about 700 feet, so low that I saw its main landing gear tucked up into its belly. It had a white bottom but I couldn't see the marking on the side due to the position of the sun. At first I thought it could be Boeing testing a 737 from CHS, but there was nothing on the schedule for there, either. Anybody got any info on what it is or what it's doing? Thanks.
BTW, I was surprised at how quiet it was! Lots of the CRJs that takeoff from MYR and fly over a lot higher are a lot louder.