What is the mechanical advantage, neglecting friction, of tackle number 5 as shown in illustration D029DG below?

Correct Answer: Option C — 5.0

A double luff tackle utilizes a double block and a triple block, resulting in five parts of the line supporting the moving block. Consequently, the theoretical mechanical advantage is 5.0. Understanding this ratio is critical for deck officers when planning lifts to ensure the hauling part remains within safe limits.