航海英語(yǔ)航海出版物單項(xiàng)選擇題每日一練(2019.01.16)

來(lái)源：考試資料網(wǎng)

1 A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.

2 A red triangular daymark marks （）.

3 A list signal of one white light indicates that the vessel is （）.

4 A petroleum liquid has a flash point of 85°F. This is a grade （）.

5 （）gives daily predictions of the times and heights of high and low waters for over 230 standard and 6，000 secondary ports in the world.