单项选择题
A.Cut the painter line so that it will not pull the liferaft container down
B.Swim away from the container so that you will not be in danger as it goes down
C.Take no action as the pull on the painter will cause the liferaft to inflate and open the container
D.Manually open the container and inflate the liferaft with the hand pump
单项选择题 An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes? （）
单项选择题 An icebreaker may use the code letter “K” to remind ships of their obligation to listen continuously on their radio. This signal may be made by any of the following EXCEPT（）.
单项选择题 An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.