22 关于人员落水时的险情通报下列说法正确的是:( )

19、Message Markers include: ( )

18、Underway means that a vessel is not ( ) ?

17、请选出下面四句话中表达正确的语句(从标准航海通信用语的角度)。( )

16、请选出下面四句话中表达正确的语句(从标准航海通信用语的角度)。( )

15、 As a communication system, protocols need to be developed to ensure that VTS messages are: ( ) A. Clear;

13、 What would be a distress signal? ( )

12、 Which of the following belong( ) to IMO message markers? ( )

11、 Which of the following belong( ) to meteorology and hydrology conditions? ( )

9、Which of the following can the reasons of restricted visibility?
( ) A. mist B. fog C. rain D. snow
Which of the following is/are half cardinal points? ( )

5、 What kind of area can be a berth? ( )