🔍 Key Concepts

• 46 CFR requirements for tank vessels carrying oil or hazardous liquids • Purpose of cargo oil pump relief valves and what risk they prevent • How often safety devices that protect against overpressure are typically checked on operating tankers

💭 Think About

• Is it more reasonable for these valves to be checked only when the Coast Guard does an inspection, or on an operational schedule connected to the ship’s trading pattern? • Think about whether the test interval should match each individual cargo operation, each trip the ship makes, or long‑term intervals like annual/biennial surveys. • Which interval best balances practicality with the critical safety role of preventing overpressure in cargo lines and pumps?

✅ Before You Answer

• Look in 46 CFR, Subchapter D (Tank Vessels) for specific wording on cargo oil pump relief valve tests. • Confirm whether the regulation links testing to a voyage, to a calendar period (year/biennial), or to each cargo operation. • Verify that the chosen option reflects a realistic schedule that operators can comply with on busy trade routes while still maintaining safety.