Question 3576 Deck General

The correct answer is D) prevent the boom from being raised too high. Boom stops are installed on offshore cranes to prevent the boom from being raised to an unsafe height. This is a safety feature to avoid the boom hitting overhead structures or objects, which could damage the crane or cause it to become unstable. The boom stops physically limit the maximum upward travel of the boom, ensuring the crane's safe operation. The other options are incorrect because boom stops do not specifically prevent the boom from swinging (A), lowering (B), or supporting the boom when not in use (C). Their primary function is to restrict the boom's upward motion to maintain safe crane operations.