Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 16 Azimuth Thrusters - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 16 Azimuth Thrusters

1.1 Application

1.1.1 This Chapter applies to azimuth or rotatable thruster units for propulsion, which transmit a power greater than 220 kW used as the sole means of steering, and are in addition to the relevant requirements of Pt 5, Ch 15 Steering Systems.

1.1.2 Azimuth or rotatable thruster units for propulsion where the power exceeds 2000 kW are to comply with the relevant requirements of the Rules and Regulations for the Classification of Ships, July 2022 (hereinafter referred to as Rules for Ships).

1.1.3 A minimum of two azimuth thruster units are to be provided where these form the sole means of propulsion.

1.1.4 The failure of one azimuth thruster unit or its control system is not to render any other thrusters inoperative.

1.2 Plans

1.2.1 The following additional plans are to be submitted for consideration together with particulars of materials and the maximum shaft power and revolutions per minute:

  • Sectional assembly including nozzle ring structure, nozzle support struts, etc.
  • Shafts, gears and couplings.
  • Steering mechanisms with details of ratings.
  • Bearing specifications.
  • Schematic piping systems of lubricating and hydraulic systems together with pipe material, relief valves and working pressures.

1.3 Condition Monitoring

1.3.1 Where Thruster Condition Monitoring (ThCM) ShipRight descriptive note has been requested, refer to ShipRight Procedure Machinery Planned Maintenance and Condition Monitoring, Section 8.

1.4 Cross-references

1.4.1 For strengthening for Navigation in Ice, see Pt 5, Ch 7 Strengthening for Navigation in Ice.

For general piping requirements, see Pt 5, Ch 10 Piping Design Requirements, Pt 5, Ch 11 Ship Piping Systems and Pt 5, Ch 12 Machinery Piping Systems.

For steering gear, see Pt 5, Ch 15 Steering Systems.

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