航海英語地文航海單項(xiàng)選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 A fairly accurate estimation of a ship’s position can be calculated by a technique known as（）.

2 The recording fathometer produces a graphic record of the（）.

3 What is the light characteristic of a lighted，preferred-channel buoy? （）

4 What describes an accurate position that is NOT based on any prior position? （）

5 A dead reckoning (DR) plot（）.