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Measures for Preventing Marine Pollution

Measures for Preventing Marine Pollution -Preventing Pollution by Oil and Waste-

Installing Overflow System to Newly-Ordered Ships

When bunkering, if fuel is supplied to one of our ships over the planned quantity, there is a possibility of fuel leakage from the air-vent of the fuel tank.

In order to prevent this situation, we are installing Overflow Pipes and Overflow Tanks to newly-ordered ships.

In addition, we are installing a leakage detector such as leakage oil flow sensor so that ship's crews can immediately recognize any oil leakage problem.

Regarding Overflow System, there is still no regulation yet; therefore this action on our part is being voluntarily taken.

Installing Overflow System to Newly-Ordered Ships

Air Seal for the Stern Tube

Using the Air Seal for the Stern Tube

We apply an air seal for the stern tube of our ships. An air seal is a device that continuously sends compressed air into the space in the stern tube where the propeller shaft penetrates out of the ship. This creates a sealed area inside the stern tube, which prevents leakage of lubricating oil and stops seawater from getting into the ship.

Air Seal for the Stern Tube

Air Seal for the Stern Tube

Use of electric powered deck equipments

We are introducing to our new ships electrically driven deck equipment, such as mooring winch and ramp ways, instead of hydraulic powered equipment. This has eliminated the risk of hydraulic oil leaks.

Electric mooring winch and mooring lines (forward deck)

Electric mooring winch and mooring lines (forward deck)

Central Cooling System (Indirect Cooling System)

The Central Cooling System cools the engine coolant and lubricating oil indirectly by exchanging heat with seawater via dedicated freshwater. Use of this system prevents leakages or spills of lubricating oil into the sea, because seawater does not become contaminated with lubricating oil in this system. In the event of the cooling system failure, leaked lubricating oil remains in the freshwater circuit only and never contaminates seawater and is never discharged into the sea.

Central Cooling System

Central Cooling System

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