Hunting in fog

I was wondering if anybody else sucks it up in the fog. I was told that when the fog burns off the ducks start flying, but that has never happened. It seems like the only chance you have for ducks in the fog is if they happen to fly by low, or you are in the exact spot they want to be in. You don't get a chance to convince any to come by and check out your decoys, cause you can't see the ducks to call to them, and they can't see your decoys.

Today in the fog, I had 4 gadwall come by low enough, and that was it. Once the fog burned off you could see birds flying, but not a ton.

Was wondering what your experience is with duck hunting in the fog.

Tanner