单项选择题 The Master or person in charge on a ship shall insure that line throwing equipment is not operated（）.

单项选择题 The Master of a cargo or tanker shall be responsible that each lifeboat，except those free-fall launched，is lowered to the water with crew and maneuvered at least once every（）.

单项选择题 The lifeboats and liferafts were（）with the provisions of the regulations annexed to the Convention.