My brother sails the Chesapeake quite a lot and found the product, NavalKleen Small Craft Formula, somewhere down there. I have a 38 Island Packet sail boat and he gave me some of his. I use it in the bilge but mostly at the fuel dock for spills in the water and on my deck. It takes care of the diesel in seconds — and, unlike detergents the oil does not simply drop to the bottom but is "eaten" by microbs & very green. And only a few squirts kills any and all smells in the bilge. Please do add me to your email list. I can't find any ship's store that carries it. They ALL should! — Thomas J. Smith, Remax At Barnegat Bay