🔍 Key Concepts

• Work-hour limits for credentialed officers on towing vessels in a 24-hour period • Difference between watch schedule (e.g., 6 on/6 off, 12 on/12 off) and the legal maximum hours allowed • Where work-hour rules are found in 46 CFR for towing vessel officers

💭 Think About

• Think about what would be considered an unsafe number of hours for a master to legally work in a 24‑hour period and eliminate any choices that are clearly unsafe or unrealistic • Consider the common watch systems used on towing vessels (like 6-and-6 or 12-and-12) and how many hours per day those result in • Ask yourself: does the law allow the master to be on duty the entire 24 hours, or is there a specific cap below 24 that is widely used in industry?

✅ Before You Answer

• Verify the maximum duty hours in 24 hours for officers on towing vessels in 46 CFR (Title 46, Shipping) • Check which of the options matches a realistic daily work limit under U.S. law, not just a typical watch schedule • Confirm that the correct choice represents a maximum legal cap, not a minimum or recommended rest period