Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 12 Propulsion Devices - Chapter 3 Thrusters - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 3 Thrusters

1.1 Application

1.1.1 This Chapter is to be read in conjunction with the General Requirements for Machinery in Pt 9 General Requirements for Machinery.

1.1.2 This Chapter gives requirements for fixed or steerable thruster units (azimuth thrusters) which are used for propulsion and steering, and also applies to transverse propulsion (tunnel) thrusters which are an aid to manoeuvring.

1.1.3 In this Chapter where the dimensions of any particular component are determined from shaft power, P, in kW, and revolutions per minute, R, the values to be used are those defined in Pt 9 General Requirements for Machinery.

1.2 Redundancy

1.2.1 A minimum of two azimuth thruster units are to be provided where these form the sole means of propulsion. Where a single azimuth thruster installation is proposed, it will be subject to consideration, taking into account the proposed restricted area notation.

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

1.3 Inclination of craft

1.3.1 Thruster units are to operate satisfactorily under the conditions as shown in Pt 9 General Requirements for Machinery.

1.4 Condition Monitoring

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

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