The hull of a submerged sea craft adjacent its stern end is provided with
auxiliary facilities for controlled maneuvering operations under low
speed conditions, including steering, stopping and negative thrust
backing performed independently of main propulsion of the craft. The
auxiliary maneuvering control facilities include a curved channel pipe
connected to two angularly related sub-channel pipe sections for
selectively controlled outflow of fluid which is pressurized by a
maneuvering control pump within the curved channel pipe before outflow
through exit openings in the hull in different directions, as negative
angle thrust jets and as steering control jets perpendicular to the hull
centerline. By use of a sub-channel flow diverting flapper and gate
valves at the inlet and exit outlet openings in the hull, all of the
maneuvering operations may be performed under selective control.