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Class 4 (4th Engineer) SC&S 📅 Jun 2024

Exam Question

Describe the construction of chain lockers and how cables are secured in the lockers? Explain how to secure anchors in preparation for a sea passage. (16)

Reference Answer

Chain lockers are critical compartments onboard a vessel, designed to safely store the anchor cables (chains) and ensure their operational readiness. Securing methods for both the cable within the locker and the anchor itself are paramount for safe navigation and adherence to international regulations.
### I. Construction of Chain Lockers
Chain lockers are robust, purpose-built compartments primarily located in the forepeak of the ship, below the forecastle deck. Their construction is designed to withstand the considerable weight and dynamic forces exerted by the anchor chain, particularly during anchoring operations and heavy weather.
* **Location and Structure**: Typically situated directly below the hawse pipes in the forepeak, often adjacent to the collision bulkhead. They are constructed from heavy-gauge steel plating, forming a strong, watertight, and often gas-tight compartment. The internal structure is reinforced to prevent deformation from the impact of the chain during dropping and heaving.

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