Question 1252 Deck Safety

The correct answer is D) 1 short blast on the ship's whistle. According to the International Convention for the Safety of Life at Sea (SOLAS), the signal to commence lowering the lifeboats is 1 short blast on the ship's whistle. This is the standard emergency signal used to indicate that the crew should begin the lifeboat launching procedures. The other answer choices are incorrect because they do not match the SOLAS regulations for the lifeboat launching signal. 3 long blasts, 1 long blast, and 3 short blasts have different meanings and are used for different purposes, such as emergency alarms or ship maneuvering signals, but not specifically for lifeboat launching.