Don’t the propellers damage sea grasses?
No, contrary to allegations about the harm caused by PWC propellers, PWC do not cause harm because personal watercraft do not have propellers! PWC are designed and operated by water propulsion. They intake water and by process of a pump emit the same water from a rear maneuverable outlet. With a PWC, a swimmer can climb aboard from the rear of the vessel without concern of a propeller-related injury.
