Abstract: A method and system for creating a water wall around the perimeter of a ship by pumping a high-pressure water stream through a plurality of rotational water dispensing heads positioned around the perimeter of the ship. Each of the water dispensing heads produces a water circle and the overlapping water circles create a water wall around the ship that cannot be broken by the intruders attempting to approach the ship and to climb on board. Each water heads has several jets dispensing water streams under high pressure. The water heads rotate under an impact of the water streams coming at an angle from the water dispensing jets. Thus, the entire boat is covered by a continuous water wall barrier, which does not allow for any intrusion attempts from another boat or from a pier.