There is “contrail” in front of the haze. The horizon of the ocean is not visible at all in either pic. So, we have a contrail at 39k appearing in front of low-level marine haze.
I know we're looking at the same pictures. Maybe my monitor resolution is better than yours. The horizon line is very discernible in both. If it helps, look just above the highest point of land to the right side of both pictures. The horizon line is just above that, and travels in a straight line from there across the entirety of both pictures.