Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 4 Steel Unit Structures - Chapter 10 Steering and Control Systems - Section 1 General

Section 1 General

Parent topic: Chapter 10 Steering and Control Systems

1.1 Application

1.1.1 This Chapter applies to all the unit types detailed in Pt 3 Functional Unit Types and Special Features, and requirements are given for rudders, nozzles, steering gear, tunnel thrust unit structure and stabiliser structure.

1.1.2 Where units are fitted with conventional rudders, the scantlings and arrangements are to comply with the requirements of this Chapter.

1.1.3 Where a self-propelled unit is fitted with a non-conventional rudder or the rudder is omitted, special consideration will be given to the steering system so as to ensure that an acceptable degree of reliability and effectiveness is provided in order to achieve equivalence to the normal Rule requirements.

1.2 General symbols

1.2.1 The following symbols and definitions are applicable to this Chapter, unless otherwise stated:

1.2.2  L, B, as defined in Pt 4, Ch 1, 5.1 General 5.1.1

  • = minimum yield stress or 0,5 per cent proof stress of the material, in N/mm2 (kgf/mm2)
  • k = higher tensile steel factor, see Pt 4, Ch 2, 1.2 Steel.

1.3 Navigation in ice

1.3.1 Where an ice class notation is included in the class of a unit, additional requirements are applicable as detailed in Pt 3, Ch 6 Units for Transit and Operation in Ice.

1.4 Materials

1.4.1 The requirements for materials are contained in the Rules for the Manufacture, Testing and Certification of Materials (hereinafter referred to as the Rules for Materials).

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