Generally, seawater is provided to the ballast tanks by a combination of flooding from the sea through valves in the tanks and from the firemain. Compensated fuel Ballast Seawater is provided to replace fuel as the fuel is used, thereby aiding ship stability.
Seawater is forced out of the tank during refueling.
Blue water navies Navies that operate on the open ocean. Boiler blowdown Periodically, water must be removed from a boiler to control buildup of particulates, sludge, and treatment chemical concentration. The process of removing this water is referred to as boiler blowdown. Boiler blowdown can also refer to the discharged water itself. Compensated fuel ballast Certain ballast systems consist of a series of tanks used for fuel storage.