单项选择题 After the order “（）” is given, the air system is shut down, the turning gear put in, all drains and indicator cocks opened, and the cooling water and lubricating oil systems kept running.

单项选择题 For vessels with （）, the meaning of the order would include the combination of pitch and revolutions as indicated in ships orders.

单项选择题 The order “Bow thrust stop” means “（）”.