[Chris Burkard]

First things first. Is that water fresh water from the fresh water tank or rain/hose water from a deck drain, or is it raw water coming from the water the vessel is sitting in? If your vessel is in salt water, it is easy enough to tell, just taste it. Your vessel's lowest point is the forward bilge, so any water leaking from aft is going to migrate forward while the vessel is at rest. If you have determined it is raw water, then as captain George suggested, I would look at the rudder shaft seals, engine shaft seals, Air-conditioning raw water pump lines and thru-hulls and all other below waterline thru-hulls. If it is fresh, then you need to look at the fresh water pressure lines, all deck drains and hot water heater and hot water lines. As Capt. George mentioned, it is tedious and you just have to eliminate one area at a time. talcum powder or water leak dyes will help you track the water migration through the bilge system.

Good Luck!