I know this is a stupid question, but I will ask it anyway. Can anyone
tell me what is being done in the so called "NO DISHCHARGE ZONES" with
gray water? If nothing can be legally discharged, how big of a holding
tank does a 57' boat with a draft of 7' need to be?

I've heard that most of the gulf coast marina's pump out stations can
handle boats with less than a 5-6' draft. Are there pump out boats that
come to you? Do you have to go out of the 3 mile limit to dump your
tank?

Any information I can get will help. I need to get the tanks in before
I can put in the engine.