航海英語(yǔ)天文航海單項(xiàng)選擇題每日一練(2019.01.16)

來(lái)源：考試資料網(wǎng)

1 The approximate positions of the stars are based on sidereal time，which is based upon rotation of the Earth relative to（）.

2 Sidereal time is NOT used（）.

3 In order for a star to be used for a sight at lower transit，the star must（）.

4 Altair is found in what constellation?（）

5 A phase correction is applied to observations of（）.