The ARX Evictor is an Anti-Piracy Water Cannon which an essential part of the multi-layered approach to ship hardening. Utilizing the ships existing fire main or high capacity water supply, the Evictor nozzles provide a powerful jet of water along with a water mist, to create an effective water shield of tremendous visual presence, inhospitable surroundings and a physical force capable of impeding the most determined of pirates.
EVICTOR utilizes the existing ships fire main or any other high capacity water supply to provide an effective water shield via twin 70 deg nozzles operating in a 90 deg arc offering the maximum effective protection. The system fully integrates with the ARX Anti Boarding and Climbing system, offering a truly effective primary layer of defence for all vessels.

What Makes it Unique?

  • Simple single connection: Using the existing ships fire main, no additional pump capacity required.
  • Low pressure drop
  • Unattended operation
  • Self-oscillating: 90 degree oscillating arc every 8 seconds
  • Water powered: pelton wheel drive with inline filter
  • Removable nozzle tube for easy storage and maintenance


Piracy remains a real global threat; there are still a high number of incidents and attacks every year. Ship hardening is integral to ensuring vessels, crew and cargo, can navigate the world’s oceans safely.
Combining the unique firefighting knowledge of Knowsley SK with the specific requirements requested by the shipping community, we are proud to be able to offer Evictor which was developed to act firstly as a visual deterrent, directing a jet of water along the ships stern.


Designed to operate autonomously; once installed and connected to the water supply the Evictor will function without the need for an operator to be present ensuring the crew can retreat to a safe area.
Where safe passage is paramount the Evictor is a cost-effective solution in the fight against piracy and can be used in conjunction with existing ship hardening techniques and procedures to provide comprehensive protection from maritime piracy.


The Evictor was designed and developed based on the long-established KSK self-oscillating monitor. Utilizing the ships fire main or any other high capacity water supply, the Evictor directs a jet of water along the ships stern and the twin nozzles oscillate in an arc to provide an effective water shield.

The powerful water jets act as a visual deterrent to any approaching vessel. Once in close proximity, the volume of water can quickly overwhelm a small boat below and the water spray creates an inhospitable environment and a physical force capable of dissuading even the most determined pirate.
The Evictor uses a bronze Pelton wheel, which takes firewater feed from the monitor inlet stand driving the oscillation. The Pelton wheel is very effective using as little as 25lpm of fire water at 7 bar g. A Y-type strainer with flushing valve is fitted to prevent blockage of the Pelton wheel water feed nozzle to ensure years of service.

Material selection is of vital importance in marine environments, the Evictor is constructed from corrosion resistant materials with this in mind.
+ Monitor Body: Gunmetal to BSEN 1982 CC492K-GS
+ Pelton Wheel & Gearbox: Bronze
+ Accessories: 316 Stainless steel

Our Global Partners

We protect either the cargo / or the assets of the global partners listed*
  • cst
  • trafigura
  • Excelerate-energy
  • sembcorp
  • cosco-shipping
  • celsius-shipping
  • adnoc
  • bp
  • thenamaris
  • sanmar
  • odfjell
  • gazocean
  • MTM
  • hafinia
  • marine-platforms
  • chartworld-shipping-corporation
  • nigeria-lng-limited
  • histria
  • hafnia
  • maran-gas
  • bergshav
  • virono-union-maritime
  • IMPA
  • fsl-trust
  • msc
  • GAC
  • durasafe
  • bhp-billiton
  • marinvest
  • v-group
  • bw
  • nordic-shipholding
  • AMOS
  • energean-oil
  • cma
  • fleet-management-limited
  • hoegh-lng
  • gaslog
  • wilhelmsen
  • wuhu-shipyard
  • wrist-ship-supply
  • norstar
  • harren-and-partner
  • dee4-captial
  • total
  • Samsung Heavy Industries
  • chemfleet
  • tipco
  • synergy-group
  • latsco
  • donnelly-tanker-management
  • reederei-nord-Group
  • atlantic-ship
  • Borealis
  • knutsen-oas-shipping
  • bsm
  • uacc
  • union-maritime
  • DSME
  • eletson
  • eships