🔍 Key Concepts

• Barge construction terms, especially headlogs and how barges are made up in a tow • Common towboat vocabulary for openings between barges • How crews describe the area where one barge can fit into another at the bow end

💭 Think About

• Think about which term is actually used by towboat crews and in towing manuals, not just a generic English word for an opening • Ask yourself: if you had a barge designed so that the bow of another barge could fit into a cut‑out in the front, what would that cut‑out be called? • Consider which word among the choices is most likely to be a specific technical term in inland towing, rather than a general word for a gap or opening

✅ Before You Answer

• Be sure you know what headlogs are (the heavy structure at the bow of a barge) • Check which option is a standard inland towing term used to describe where one barge can fit into another at the bow • Eliminate any choice that sounds like ordinary everyday language rather than a specific barge‑design term