In black you can see the eastern US coast. In many of the images you will notice large light violet areas. These are either cloudy areas that were not cold enough to be eliminated by the computer, or areas that are outside of the temperature scale. As you see more and more images, you will learn the difference. Finally, these images were navigated using the predicted satellite position, which may be slighty in error, resulting in a shift of the coastline.
Exact navigation requires human intervention.