Hello Bill, The marine head is in the V berth, starboard side. The small square holding tank sits forward of the head with a vent and deck pumpout leading up to the toerail. I modified the holding tank years ago to be removable and only to be used for "liquids". This was for the benefit of female passengers and my bride. I used a plastic gas tank and modified the fittings. This way, I could remove the tank and empty it at the marina dump site. I returned the system to stock form before my trip to the North Channel in Ontario to be legal. Bones ____________________________________________________________ Woman is 53 But Looks 25 Mom reveals 1 simple wrinkle trick that has angered doctors... http://thirdpartyoffers.juno.com/TGL3141/50d3dbe221df55be114b8st02vuc