单项选择题
A.before the boat is lowered from the stowed position
B.as the boat fall blocks break clear of the davit head
C.before the boat is lowered from the embarkation level
D.after the boat is released into the water
单项选择题 Your vessel has lifeboats on both sides. Lifeboat No. 2 is located（）.
单项选择题 Your vessel is equipped with totally enclosed lifeboats. Which statement is TRUE when the boat is enveloped in flames?（）.
单项选择题 Never（）the lifeboat or lifecraft disengaging locks or hydrostatic release gears because it can cause them to fail to function.