🔍 Key Concepts

• 46 CFR Subchapter I – look for sections on Periodic tests and inspections for machinery and pressure piping • The difference between annual, periodic inspection, and dry-dock/internal structural exams in 46 CFR • Why opening sea chests, sea valves, sea strainers, and emergency bilge suction valves is considered a major maintenance/inspection task, not a routine visual check

💭 Think About

• Ask yourself: In 46 CFR, which inspection interval is used for work that normally requires the vessel to be out of the water (like opening up sea chests)? • Think about how often the Coast Guard expects underwater fittings and suction lines to be fully opened and examined internally, compared to simpler tests like operating a valve or checking for leaks. • Review how 46 CFR defines the schedule for periodic inspections versus annual inspections—which one is tied most closely to dry-docking requirements?

✅ Before You Answer

• Verify in 46 CFR how often a vessel is required to be in dry-dock for hull and underwater fittings examinations. • Check whether the regulation language for these components says they must be opened "at each periodic inspection", at a specific number of years, or "annually". • Confirm that the answer choice you pick matches both the correct interval and the requirement that the vessel be in dry-dock for this work.