航海英語(yǔ)海圖及海圖作業(yè)單項(xiàng)選擇題每日一練(2019.01.12)

來(lái)源：考試資料網(wǎng)

1 A chart position enclosed by a semi-circle is a(n) （）.

2 A Mercator chart is a （）.

3 How is the annual rate of change for magnetic variation shown on a pilot chart?（）

4 When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）

5 Which information does the outer ring of a compass rose on a nautical chart provide（）.