航海英語緊急用語單項選擇題每日一練(2019.01.13)

來源：考試資料網

1 What happens to the efficiency of an anchor when it is moved from sand to mud?（）

2 The expression DROP ANCHOR means（）.

3 Five or more short blasts on a vessel’s whistle indicates that she is（）.

4 The towing light is a(n)（）.

5 Tripping defects in anchors frequently occur in（）.