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 17 Steerable Bow Thrusters - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 17 Steerable Bow Thrusters

1.1 Application

1.1.1 This Chapter applies to bow thruster units intended for manoeuvring having a power of 110 kW and over, fitted on ships with a length exceeding 110 m, see Pt 5, Ch 1, 5 Propulsion redundancy or where a fire in the main machinery space incapacitates the main engines. See Pt 5, Ch 1, 4.3 Ventilation 4.3.4.

1.1.2 Thrusters of less than 110 kW are to be built in accordance with good engineering practice and tested as required in Pt 5, Ch 17, 6.1 General.

1.2 Plans

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

  • Sectional assembly.
  • Shafts, sealing devices, gears and couplings.
  • Steering mechanisms with details of ratings.
  • Bearing specifications.
  • Schematic piping systems.
  • Propeller/impeller where the diameter exceeds 1 m.
  • For CPP installations, pitch control device.
  • Structure of the tunnel showing details and thicknesses.

1.3 Cross-references

1.3.1 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.

For azimuth or rotatable thruster units, see Pt 5, Ch 16 Azimuth Thrusters.

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