🔍 Key Concepts

• Rule 35 – Sound signals in restricted visibility • Difference between signals for the vessel towing and for a vessel being towed • Special rule for the last vessel of the tow versus any intermediate vessels in a towline

💭 Think About

• First, recall what sound signal the towing vessel (the tug) must give in fog. Then, think about whether each vessel being towed must always repeat that same signal. • Ask yourself: does the Rule treat the last vessel of the tow differently from the vessels in between (like the second barge) when it comes to fog signals? • Compare the blast patterns in the answer choices with the standard patterns in Rule 35, and decide which pattern—if any—is assigned to a vessel being towed that is not the last vessel.

✅ Before You Answer

• Verify in Rule 35 exactly which vessel in a tow (if any) is required to make its own sound signal in restricted visibility. • Check whether the Rule mentions intermediate tows (like the second barge) or only the last vessel of the tow. • Confirm what pattern “one prolonged and three short blasts” belongs to, and whether it is assigned only to the last vessel of the tow or to every vessel in the tow.