Anti-piracy curtain to deter pirates from attacking ships
In an effort to deter pirates from attacking ships, the Anti-Piracy Curtain has been developed by MTI in the NYK Group, and Yokoi, a manufacturer of fire hoses.
The system consists of two elements, the first sprays water from high-volume nozzles, which hinder the pirates from boarding the ship, as well as filling up the pirate's vessels with water, and the second are hoses which whip around violently, with the purpose of intimidating pirates from a distance.
"If a pirate boat approaches, with this system, the first line of defense is to threaten to capsize the pirate boat, by filling it with water at the rate of over 1 cm per minute. Another tactic is our patented hose, which is a new idea. By spraying water from the nozzle tip, the hose is made to move around unpredictably, using a very small amount of water. We've made the hose snake around near the bottom of the boat, without rising too high, by attaching a sinker to the end."
The high-volume nozzle was developed to work effectively with the fire pumps on small boats, which are especially vulnerable to piracy. It sprays enough water to prevent a ladder being raised, maintaining a rate of two tons of per hour at a pressure of 0.2MPa. Also, the hose deters pirates from climbing aboard, through its irregular motion and impact force of around 700 N.
"Ordinary anti-piracy systems use water cannons to spray high-pressure jets at pirates. But our system deters intruders by sending water downward like a waterfall, and it is also very easy to see from a distance."
The hose has been certified for its non-igniting and antistatic performance. Damage to hull paint is also prevented by using a cover, and the system has been confirmed to operate continuously for two weeks.
The Anti-Piracy Curtain is virtually complete, so MTI and Yokoi plan to test it at sea, while making improvements for the commercial version.