Abstract: A seagoing boat is driven by at least two rudder propellers and has a hull for transporting cargo or passengers. The rudder propellers are preferably embodied as electric rudder propellers. The hull has an approximately rectangular cross section amidships, to which flow-directing bodies are connected. A flow channel is configured between the skegs, the flow channel being embodied in a wedge-shaped manner with a continuous, preferably slightly bent enlargement in the direction of the bottom astern. The side walls of the flow channel are configured at least in part as even surfaces and taper off in the form of fin-shaped teeth having water displacement volume. The streaming effect of the flow channel generates a low boat resistance. The influence of the flow channel on the wake has a positive effect on the propulsion efficiency.

Abstract: A course-holding, high-speed, sea-going vessel having a hull which is intended to hold payloads or passengers and at least one rotatable, preferably electric, rudder propeller (POD) which is arranged gondola-like under the hull of the vessel and has, to supply it with power, at least one motor/generator unit which is arranged in the hull of the vessel, the hull of the vessel having at least in part a bottom which rises somewhat toward the two sides of the hull, and in that the front part of the hull is designed so as to stabilize the course and movement of the vessel and ending under water, in particular in a relatively slender bow with a bulb, and in that a flow-guiding element (skegg) is arranged upstream of each rudder propeller in order both to optimize the handling characteristics and to achieve an optimized flow against the rudder propeller, which has a displacement volume for the water flowing against the respective rudder propeller.