🔍 Key Concepts

• Special signals for tank vessels handling flammable or combustible cargo alongside a dock • Difference between day shapes (like flags or shapes) and night signals (lights) for dangerous cargo operations • Where these requirements are found in 46 CFR and how they apply to barges vs self-propelled tankers

💭 Think About

• Ask yourself: what is the traditional, internationally recognized danger signal for vessels engaged in hazardous cargo operations at night? • Think about which of these options would be easily recognized from a distance as a warning to other vessels and people near the dock. • Consider whether the signal should be steady-burning or flashing, and why that matters for cargo transfer operations.

✅ Before You Answer

• Verify in 46 CFR the required light color used to indicate transfer of flammable liquids on a tank vessel or barge at night. • Check whether the regulation calls for one light or multiple lights, and if they must be visible all around the horizon. • Confirm if any of the listed options (ICC yellow, flashing amber, orange lights) are actually named in the current U.S. regulations for this specific situation.