Section 3.10: Site Plans and Technical Data - Rick Neufeld Comments

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Northern Gateway Pipelines Inc. Section 3.10: Site Plans and Technical Data Table of Contents Figure 4-1 Docking Monitoring System Display Board (Source: Harbour & Marine Engineering) 4.13 Quick Release Hooks and Mooring Load Monitoring System Quick release hooks are standard equipment for marine oil terminals. They provide a safe and efficient means of securing a vessel alongside the berth and, in an emergency situation, can allow for the rapid release of mooring lines even while under full tension. As shown in Figure 4-2, a quick release hook is a steel assembly with one or more pivoting hooks which can swivel to accommodate mooring lines coming from different angles and inclinations from the ship. Quick release hooks can be manufactured with either single, double, triple, or quadruple hooks depending on the terminal’s requirements. Page 4-8 FINAL - Rev. 0 January 20, 2010
Northern Gateway Pipelines Inc. Section 3.10: Site Plans and Technical Data Table of Contents Figure 4-2 Typical Triple Quick Release Hook (Source: Harbour & Marine Engineering) The quick release hooks are securely anchored to the berth structures to provide strong mooring reaction points for the ship’s mooring lines. Each hook unit typically includes an integrated capstan which is used to haul in the mooring line before it is placed on its corresponding hook. Once a mooring line is attached to a hook, the line is tensioned by the winch gear on the ship. Although the hooks are designed for quick release even when the lines are under full tension, it is typical practice to release the ship’s winch brakes and reduce the line tension gradually before removing the line from the hook. This practice avoids any potentially dangerous recoil which may occur if the line were released under full tension. One safety feature of the quick release hooks is their Remote Release System, which allows mooring lines to be safely released from a control console located in the central control room, as shown in Figure 4-3. This reduces the need for terminal personnel to be on the berth structures in close proximity to highly tensioned mooring lines The remote release console is typically located in the control centre adjacent to the operator’s control displays. The displays will have the capability of monitoring the load in each mooring line via the Mooring Load Monitoring System. January 20, 2010 FINAL - Rev. 0 Page 4-9
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Section 3.10: Site Plans and Technical Data - Rick Neufeld Comments

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