单项选择题 The company should establish procedures to ensure that（）related to safety and protection of the environment are given proper familiarization with their duties.Instructions which are essential to be provided prior to sailing should be identified,documented and given.

单项选择题 As the temperature for a given mass of air increases, the（）.

单项选择题 Under threat, ship master activate SSAS system and send a message to（）.