When commencing cargo operations on a container ship, one cell at a hatch is generally discharged completely (to the bottom of the ship) before removing any containers from the adjoining cells to __________.
• Transverse stability of container ships during loading/discharging • Effect of partially-empty adjacent cells on container stack support and lashing gear • How cargo operations are sequenced to keep forces and moments on the hull and structure within safe limits
• Ask yourself what structural or safety problem might occur if you start discharging containers from several neighboring cells only partway down at the same time. • Consider how container stacks are supported laterally and vertically—what happens to the support for a stack if the adjacent cell is still full or only partly empty? • Think about which option relates to a standard, routine safety practice rather than something done only in special situations like correcting a list or speeding up work.
• Identify which choice best matches a routine operational safety practice used on almost all container ships. • Check which option relates to preventing excessive stress or unsafe conditions (either on the ship’s structure or on container stacks) as cargo is removed vertically in one cell. • Eliminate any options that sound like secondary benefits (comfort, convenience, or speed) rather than the primary safety/technical reason for the sequence of discharge.
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