🔍 Key Concepts

• 46 CFR Subchapter D requirements for tank vessels • Difference between inspection interval and window within the COI validity period • How the Coast Guard defines the allowable time window in months for an annual inspection

💭 Think About

• Look carefully at how often annual inspections are required and then think about how much flexibility (in months) the Coast Guard normally allows around that interval. • Compare each choice to a 12‑month cycle: which ranges are clearly too short or too long to be considered an "annual" inspection window? • Ask yourself: does the window start too early (well before 1 year) or extend too late (well beyond 1 year) to still reasonably be called annual?

✅ Before You Answer

• Verify in 46 CFR the specific month-range window permitted for an annual inspection of a tank vessel while the COI is valid. • Check which options straddle one year (12 months) in a way that allows a realistic scheduling window but not so wide that it ceases to be effectively annual. • Eliminate any range that would force inspections significantly more frequent than yearly or that permits them far later than yearly.