Which term describes lines erected around the weatherdecks of a ship to prevent personnel from falling overboard?

The term that describes lines erected around the weatherdecks of a ship to prevent personnel from falling overboard is lifeline. Lifelines are typically made of sturdy rope or wire and are an important safety feature on ships, particularly on open decks where there is a higher risk of people accidentally falling over the side.

These lines serve as a physical barrier to enhance safety and help maintain onboard discipline during operations at sea. They are often used in conjunction with safety harnesses and other equipment to protect personnel in rough weather or during high-seas operations.

The other terms refer to different ship components or areas: a passageway is a corridor or walkway used for moving through the ship; an overhead refers to the ceiling or upper part of a compartment; and a scullery is a small room or area designed for washing dishes and preparing food. Understanding these definitions highlights how lifelines specifically pertain to safety measures on deck, distinguishing them from other ship-related terms.