单项选择题 The lifeboats on your vessel are stowed on cradles on deck and are handled by sheath-screw boom davits. Which of the following statements about launching a boat is TRUE?（）

单项选择题 The International Load Line Certificate is a document indicating the（）of the various load lines of the vessel.

单项选择题 The internal volume of a cargo hold measured from the inside faces of the cargo battens，the lower side of the deck beams，and the top of the tank top ceiling is known as the（）.