Question 1282 Deck Safety

The correct answer is B) limit switch. When a boat is at the top of the davit heads, the davit arms begin moving up the tracks. The movement of the davit arms is stopped by a limit switch, which is a safety mechanism designed to prevent the davit arms from going beyond their designated range of motion. The limit switch automatically cuts off the power to the davit system when the arms reach a certain point, ensuring that the boat is not lifted too high and preventing potential damage or accidents. The other options are incorrect because: A) the hoist man is the person operating the davit system, not the mechanism that stops the movement; C) the brake handle is used to control the speed of the davit arms, not to stop their movement; and D) the preventer bar is a separate safety device that prevents the boat from swinging out too far, not the mechanism that stops the upward movement of the davit arms.