🔍 Key Concepts

• Two-watch system requirements in 46 CFR for licensed or credentialed personnel • Differences in manning rules between inspected vessels (cargo, tank, OSVs) and uninspected towing vessels • When a voyage length (more than 600 miles) changes manning or watchstanding requirements

💭 Think About

• Which of these vessel types has the most specific, detailed manning and watchkeeping requirements for credentialed officers in 46 CFR? • How does a long voyage (over 600 miles) affect whether a two-watch system can be used instead of a three-watch system for officers? • Which vessel type is subject to stricter safety and operational oversight due to the nature of the cargo carried?

✅ Before You Answer

• Verify in 46 CFR Part 15 (Manning Requirements) which vessel types are explicitly mentioned in the section on two-watch systems for voyages over 600 miles. • Check which of these vessels routinely carry dangerous or pollutant cargo and therefore have more stringent watchstanding rules. • Confirm whether uninspected towing vessels have the same specific two-watch provisions as the other (inspected) vessel types.