单选题 MAYDAY is to be used to announce ______.

单选题 Which of the following information are not in Chapter One of the Sailing Directions?

单选题 Information about the change of local lighthouse can be found in part ____ of NM.

单选题 Which of the following is not marked on the charts?

单选题 If not otherwise stated, the time used in Admiralty Sailing Direction is the ______.

单选题 We can look up the natural condition in ______.

单选题 Attention is ______ the advice on the use of charts.

单选题 The weekly Notice to Mariners contains information needed for ______.

单选题 The Tide Table gives the prediction of the ______ of high and low water in standard ports.