HM-RAT-200 stern
The HM‑RAT‑200 is a retractable azimuth thruster mounted at the stern that provides 26 kN of thrust from a 200 kW drive, with a compact 540 mm propeller diameter for enhanced maneuverability and reduced drag when retracted; source-listed power 200.0 kW. The supplied category identifies it as Retractable 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, this entry is distinguished from neighbouring variants by its model designation and the explicitly listed power; no further model-specific difference is stated in the source. 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.
Components & Design
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Technical Data
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Common failures & inspection points
Service & Maintenance
Inspect gear oil, filters, seals, bearings, steering or slewing mechanism, propeller condition and control feedback. Trend vibration, oil debris, temperature and steering response. Check underwater sealing and propeller condition during docking. Refer to the manufacturer documentation for the exact figure for oil condition, gear backlash, bearing and seal limits.
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