Question 1281 Deck Safety

The correct answer is B) Gravity davits. Limit switches are used on gravity davits to prevent them from going past their safe operating limits. Gravity davits rely on the force of gravity to lower and raise lifeboats and other survival craft. Limit switches are installed on these davits to automatically stop the lowering or raising motion when the davit arm reaches its maximum safe extension or retraction. This helps prevent damage to the davit system and ensures the safe operation of the survival craft. The other answer choices are incorrect because sheath-screw, radial, and quadrantal davits do not rely on gravity for their operation, and therefore do not typically require limit switches to control their motion.