Section 4 Validation of requirements for emergency release systems
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 16 Towing Winch Emergency Release Systems - Section 4 Validation of requirements for emergency release systems

Section 4 Validation of requirements for emergency release systems

Parent topic: Chapter 16 Towing Winch Emergency Release Systems

4.1 Documentation

4.1.1 Operation and maintenance procedures for the emergency release system are to be incorporated in the vessel’s operations manual.

4.1.2 Components critical for the safe operation of the emergency release system are to be identified by the manufacturer and included in the operations manual on board the vessel.

4.1.3 Instructions for surveys and periodic testing of the emergency release system are to be documented by the manufacturer, agreed with LR and are to be kept on board the ship on which the winch has been installed. The documentation is to be made available to the Surveyor on request.

4.2 Testing and trials

4.2.1 All testing and trials defined within this Section are to be carried out under survey to the satisfaction of the attending Surveyor.

4.2.2 For each emergency release system, the requirements of Pt 7, Ch 16, 3.2 Emergency release system operation are to be verified either at the manufacturer’s works or as part of the commissioning of the towing winch when it is installed on board. Where verification solely through testing may present a safety hazard, testing may be combined with inspection, analysis or demonstration in agreement with LR.

4.2.3 The performance capabilities and operating instructions of the emergency release system are to be included in the manufacturer's operating manual which is to be made available on board the ship on which the winch has been installed.

4.2.4 The full functionality of each emergency release system fitted is to be tested as part of the shipboard commissioning trials to the satisfaction of the attending Surveyor. Testing may be conducted either during a bollard pull test or by applying the towline load against a strong point on the deck of the tug that is certified to the appropriate load.

4.2.5 Where the performance of the winch in accordance with Pt 7, Ch 16, 3.2 Emergency release system operation has previously been verified, the load applied for the installation trials is to be at least the lesser of 30 per cent of the maximum design load or 80 per cent of vessel bollard pull.

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