The hydraulic tank stores the fluid used to operate hydraulic equipment.
The hydraulic tank holds fluid for all of a vessel's hydraulic equipment, avoiding the need for individual systems. It can supply bow thrusters, windlasses, stabilizers, rudders, watertight doors, etc.
The hydraulic tank is usually made of metal in the form of a rectangle. It has openings for the valves controlling fluid flow to the various machinery. Some include heating or cooling elements, should fluid temperature need adjustment.
Choice will depend on tank capacity and the type of fluid it will contain. The number of pumps and amount of hydraulic equipment to be supplied should also be considered.