航海英語航路指南單項(xiàng)選擇題每日一練(2019.01.16)

來源：考試資料網(wǎng)

1 A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.

2 Every new supplement to the Sailing Directions （） the previous one．

3 AFTER DROPPING THE PILOT means （）.

4 Admiralty Sailing Directions are Kept up to date by （）.

5 Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.