Which of the following statements is correct...

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Question 1 of 205eccef9bbacbc34ba4d45696

Which of the following statements is correct if the length of the vessel between perpendiculars is 500 feet, and the through hull opening is five feet above the summer load line for the overboard discharge of the system illustrated? See illustration GS-0125.

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🔍 Key Concepts

• Review 46 CFR 56.50 requirements for overboard discharges and shell connections on vessels of about 500 ft in length. • Note how the rule changes when the opening is above vs. below the summer load line. • Identify on the illustration which valve is the inboard valve and which is the outboard/shell valve, and which one (if any) is the automatic non‑return valve.

💭 Think About

• Ask yourself: When the overboard opening is above the summer load line, does the regulation still demand two valves at the shell, or can that requirement be relaxed? • Consider: In this system, if flooding were to occur from a failure at the shell, which valve (inboard or outboard) actually protects the ship, and what type of action (positive closing vs. automatic non‑return) is most critical? • Think about how the requirement would be different if the opening were below the load line; then compare that stricter case to this question’s situation and see which answer choice matches the relaxed condition.

✅ Before You Answer

• Verify in 46 CFR whether two valves are only mandatory when the opening is below the load line or in certain length/compartment situations. • Confirm which answer choices require a positive closing valve at the shell versus inboard in the system. • Make sure the option you choose still provides automatic non‑return protection for backflow while matching the reduced requirements for an opening 5 ft above the summer load line.

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