航海英語地文航海單項選擇題每日一練(2019.01.15)

來源：考試資料網(wǎng)

1 What is the major advantage of high altitude observations?（）

2 Which of the following are data layer categories to be displayed on ECDIS（）．

3 Which position includes the effects of wind and current（）.

4 What describes a flood current（）.

5 When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.