24. What is the minimum speed of lifeboat when proceeding ahead in calm water, when loaded with its full complement of persons and equipment and with all engine-power auxiliary equipment in operation as per LSA Code (International Life-Saving Appliance Code)? (A) At least 4 knots. (B) At least 5 knots. (C) At least 6 knots. (D) At least 7 knots.