Section 7 Thruster-assisted positional mooring
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 7 Other Ship Types and Systems - Chapter 8 Positional Mooring and Thruster-Assisted Positional Mooring Systems - Section 7 Thruster-assisted positional mooring

Section 7 Thruster-assisted positional mooring

Parent topic: Chapter 8 Positional Mooring and Thruster-Assisted Positional Mooring Systems

7.1 General

7.1.1 When the positional mooring system is supplemented by thrusters, the requirements of Pt 7, Ch 4 Dynamic Positioning Systems, are to be generally complied with in respect of the machinery, electrical and control engineering arrangements. In applying these requirements, the arrangements for the notations DP(CM), DP(AM) and DP(AA) may be regarded as equivalent to those for supplementary notations [T1circ] [T2circ] and [T3circ] respectively, unless otherwise stated in this Chapter.

7.2 Control systems

7.2.1 Suitable processing and comparative techniques are to be provided at the central control station to validate the control system inputs, thereby ensuring optimum performance of the thruster-assisted mooring system.

7.2.2 Abnormal signal errors revealed by the validity checks required by Pt 7, Ch 8, 7.2 Control systems 7.2.1 are to initiate alarms.

7.2.3 The control system is to be stable throughout its operational range and is to meet the specified performance and accuracy criteria.

7.2.4 An alarm is to be provided for a control computer system fault.

7.2.5 Sufficient instrumentation is to be fitted at the central control station to ensure effective control and indicate that the system is functioning correctly, see also Pt 7, Ch 8, 6.2 Control stations.

7.2.6 The deviation from the desired heading and/or position is to be adjustable, but should not exceed the specified limits. Arrangements are to be provided to fix and identify the set points for the desired heading and/or position.

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