Question 4566 Deck General

The correct answer is D) prevent the boom from being raised too high. Boom stops are safety devices installed on offshore cranes to limit the maximum height that the boom can be raised. This is an important safety feature to prevent the boom from being raised to an unsafe angle, which could lead to the crane becoming unstable or the boom colliding with overhead obstructions. The other answer choices are incorrect because they do not accurately describe the purpose of boom stops. The boom stops do not prevent the boom from swinging (A), lowering (B), or being supported when not in use (C). Their sole function is to limit the upward travel of the boom to a safe maximum angle.