The correct answer is B) swung from one hatch to the adjacent hatch. The Steulchen boom is a type of cargo handling boom used on ships, characterized by its ability to swing between adjacent hatches. This allows for efficient cargo operations by enabling the movement of loads directly between nearby cargo holds without the need for extensive rigging or repositioning of the boom. This flexibility and mobility are the main advantages of the Steulchen boom design. The other answer choices are incorrect because: A) collaring the boom to the mast would limit its range of motion, C) a single winchman would not be able to effectively operate the boom, and D) cradling the boom on deck would not allow for the swinging motion that is the defining characteristic of the Steulchen boom.