5.6 SEA WATER SYSTEMS

The sea water systems on board are:

• Engine cooling system
  This consists of two circuits, one for the starboard engine and one for the port engine. Sea water is sucked directly by the inner pumps of the same engines, by means of two sea cocks equipped with two cut-OFF valves and strainers. The water sucked in by the engines flows through the strainers and is then delivered to the heat exchangers of the gear boxes and to the heat exchangers of the same engines, and then discharged overboard. Moreover, suitable circuit branches cool the exhaust manifolds.
• Generator cooling system
  Seawater is sucked in by the generator pump through the seawater intake equipped with a shut-OFF valve and strainer. The water sucked in by the generator, after passing through the strainer, is sent to the generator heat exchanger and then discharged overboard. To discharge water and exhaust fumes outboard, the generator channels the discharge through a muffler and then to a separator.
• Fire extinguishing system
  This consists of an electric pump that sucks in seawater through a seawater intake fitted with a shut-off valve and strainer and sends it to the fire hose.
• Air-conditioning unit cooling system
  This circuit consists of a seawater intake with shut-OFF valve, an inspectable seawater strainer and a connection for distribution to the air-conditioning unit.
• Gyroscopic stabilizer cooling system
  Seawater is sucked in by the pump used to cool the stabiliser via a seawater intake equipped with a shut-OFF valve and strainer. The suctioned water, after passing through the strainer, is sent to the stabiliser heat exchanger and then discharged outboard.
• Watermaker unit supply system (optional)
  This circuit consists of a seawater intake with shut-OFF valve, an inspectable seawater strainer and a connection for distribution to the watermaker unit.
• Propeller shaft seal cooling system
  This circuit consists of a seawater intake with shut-OFF valve, an inspectable seawater strainer and a connection for distribution to the propeller shaft seals.
  

CAUTION

Before cleaning the strainer of the sea cocks, check that the utilities supplied with sea water are switched off and not used.

WARNING

It is good practice to close all sea cocks when leaving the yacht in the water for a long time.

CAUTION

In case of sinking hazard, if the escaping conditions allow it, close all ball valves of the sea intakes.

DANGER

The lack of care while cleaning each sea intake strainer can cause serious damage to the on-board devices and, in some cases such as fire, it may have extremely serious consequences. Check before undertaking the navigation and at regular intervals during navigation, the condition of the sea cock strainers of the various devices through the transparent cover.

Sea water distribution system: