Question 2061 Deck General

The correct answer is B) Crossing the spring lines. Crossing the spring lines is the most useful method for allowing a boat to rise and fall with the tide. This is because the crossed spring lines act as a pivot point, allowing the boat to move up and down vertically with the changing tide while still keeping the boat secured. The other options, such as slacking all lines or doubling up on lines, do not provide the same degree of freedom for the boat to move vertically. The other answer choices are incorrect because they either do not allow for the boat's vertical movement (A and D) or do not provide the same level of security as the crossed spring lines (C).