10. You are assigned to a tractor tug with a drive system as shown in figure «A» of the illustration. What type of propulsion drive system is illustrated

The illustration depicts a cycloidal propeller drive, characterized by a horizontal disc with vertical blades. This design allows for thrust in any direction without hull rotation, distinguishing it from azimuthing, controllable-pitch, or conventional fixed-propeller drives, which utilize a single propeller on a shaft or a steerable pod with a horizontal propeller.