I took these photos from my kayak on an extremely foggy morning. I didn't have my GPS with me at the time so I just kept the bright part of the sky to my back and headed across the river. The conditions were white out. When I finally made it across I was about three hundred yards down from where I thought I would end up. If I wouldn't have kept the bright part of the sky, or where the sun was coming up, to my back I probably would've just paddled around in circles. In conditions like this, even in a familiar location, it's a good idea to have a compass or GPS. What I like about the second photo is you can't tell where the water ends and the sky begins.