Both lifeboats launched at 1415 to an initial report of two speedboats involved in an incident at the Thamesport Terminal at the Isle of Grain. Both lifeboats arrived on scene and it was reported that one of the craft had crossed the wake of another craft and one of the passengers had been thrown forward and injured. Along with the lifeboats, Kent Fire/Rescue, CG Rescue Helicopter and Ambulance paramedics in attendance, the person was treated on scene by paramedics and lifeboat crew and transferred safely to the berth, where the person was transferred to hospital by ambulance. The damaged speedboat was towed back to Sheerness, no one else was injured. Both lifeboats returned to station at 1700. NE Lt Airs.