(under the class definition) Device wherein the propelling means itself is capable of floating or exhibits the tendency to float.
(1) Note. These devices include more than the structure of the propeller element, per se, or is otherwise excluded by definition from Class 416, Fluid Reaction Surfaces (i.e., Impellers).
(2) Note. Buoyant propelling means which is helicoid in shape are found in this class, subclass 48, helical screw.
