Two more. One is the forward head sink/shower sump discharge. Just above the waterline. The other is the raw water intake, located in the engine room, next to one of the cockpit drain thru-hulls. I have decided to go with a seachest for the distribution of raw-water to the relevant systems. The sea-chest is currently under design, but I have at least decided WHERE it will be, therefore, the thru-hull can go in. Only one more thru-hull to install under the waterline. That will be the holding tank waste discharge. I wont do that one until I am ready to install the septic system.