Aquamaster US 4000mm 5B

The Rolls‑Royce/Kongsberg Aquamaster US 4000 mm 5B is a podded azimuth thruster with a 4 m fixed‑pitch NiAlBz propeller, delivering thrust and steering in a single compact unit. The supplied category identifies it as Azimuth Thruster, and it is normally installed below the hull or in a dedicated thruster compartment as a steerable propulsion unit capable of rotating its thrust direction. In that role, its primary purpose is to provide both propulsion and steering by vectoring propeller thrust through the azimuth unit. Compared with a conventional shaft, rudder and propeller arrangement, an azimuth thruster combines thrust generation and steering in one rotating unit. Within the supplied list, neighbouring variants are distinguished by their model designations and naming, while the source does not state further model-specific hardware differences. No additional performance, approval or construction detail is inferred from the model code beyond the information supplied in the source record. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.