Keep in mind, too, that the wingspan of the aircraft is 52’. The folks floating, from above, are maybe 2’ x 2’. So 1/26th the width of the wingspan. They aren’t going to be very big on this picture.
You’re right of course, there was one image I didn’t save, it seemed to show the swimmer quite close to shore, the image of what might have been him was the size of grain of wheat. I tried to enlarge it, and it turned into fuzz. As I wrote earlier, if the survivors had been that easy to see that they could be photographed from an aircraft, why the need to drop flares?
The wingspan includes both left and right wings and the cabin width, but the area being looked at is only the right wing so your proportion is off by over 50%.