What is the name of tackle number 6 as shown in illustration D029DG below?

Correct Answer: Option B — Threefold purchase

A threefold purchase utilizes two triple blocks, yielding a theoretical mechanical advantage of 6:1. This is a heavy-duty rigging system. Deck officers must recognize this configuration to accurately assess the force required on the hauling part while accounting for friction losses inherent in multi-sheave systems.