In astern towing, a tow span, also called...

🔍 Key Concepts

• Astern towing arrangement and where the tow span/tow bar is located relative to the stern • How a tow span/towing arch interacts with the towing hawser as it changes angle or sweeps from side to side • Typical problems on a towing vessel’s stern: fouling on deck gear, chafe points, and lead of the hawser

💭 Think About

• Visualize the stern of a tug: if the tow wire moves from port to starboard, what danger does that create for fittings, bitts, and deck gear near the stern? • Ask yourself what a rigid or elevated span/arch across the stern actually does to the path (lead) of the tow line as the tug yaws or alters course. • Which option describes a function that would be most critical for safety and avoiding damage when the towline sweeps across the stern in a seaway?

✅ Before You Answer

• Identify which option specifically addresses keeping the towline clear of obstructions or gear on the stern. • Check which choices sound like primary safety purposes versus side benefits or incorrect assumptions (for example, about vessel stability). • Confirm which function would matter most when the tow sweeps to large angles off the tug’s centerline in rough conditions.

In astern towing, a tow span, also called the "tow bar" or "towing arch", is used to __________.

insure that the hawser leads directly aft as it passes over the stern of the towing vessel

prevent fouling of the hawser on deck gear located on the stern of the towing vessel

increase the stability of the towing vessel by raising the hawser off the deck

reduce chafing of the towing hawser

🔍 Key Concepts

💭 Think About

✅ Before You Answer