Abstract: A projectile can be fired at a surface vessel and, upon impact, an air bag may be deployed almost instantaneously from underneath the vessel. Through the rapid inflation of the air bag, the stability and orientation of the target surface vessel may be disturbed. Disturbance, at a minimum, may reduce and change the trajectory of the surface vessel, but, in some circumstances, the surface vessel may be overturned. The air bag may be designed with an anti-slip coating to directly couple to the wet hull of the surface vessel. In some embodiments, the projectile may include a delay to enable the air bag to be positioned under the vessel before inflation thereof.

Abstract: A projectile system for impeding vessel movement is provided. The system includes a projectile device that contains a superoxide material for generating an exothermic reaction when exposed to water. At termination of flight, the projectile releases the superoxide material into the surrounding water. A delay can be set to enable the projectile to release its payload underneath the water surface, creating both a disturbance in the water and large gas bubbles to affect the trajectory of the target surface vessel.