6、狭水道如图所示“”,表示( )

57、 The horizontal direction of the vessel’s bows at a given moment measured in degrees clockwise from the north is called ( ) .

56、 The height from the waterline to the highest point of the vessel is called ( ) .

53、 A vessel which has been destroyed or sunk or abandoned at sea is called ( ) .

50、 IF a vessel is floating, not controlled, without a clearly determinable direction, we say she is ( )

49、 If the true course of a ship is 150°, we will say ( )

48、 If any part of the message are considered sufficiently important to need safeguarding, say: "( )" - followed by the corresponding part of the message.

47、 When a mistake is made in a message, say:"( )" - followed by the word:"Correction" plus the corrected part of the message.

46、 When rudder angles e.g. in wheel orders are given, for example “15”,say:( ).

45、为了方便进行岸-船之间、船-岸之间或一般无线电通信,或当《标准航海通信用语》不能表达所要表达的意义时,应使用( )个信息标识之一,以增加准确理解相互意图的可能性。

44、 A mark or position at which a vessel is required to report to the local VTS Station to establish its position is( ).