航海英語GPS、DF及LC的使用單項選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 If several fixed navigational lights are visible at the same time，each one may be positively identified by checking all of the following EXCEPT what against the Light List?（）

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2 At sea，we can use（）to fix the ship’s position.

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3 If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.

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4 Vessels in port may use（）for receiving typhoon warnings during the typhoon season.

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5 （）is not an alarm required by IMO standards to be available on the ECDIS.

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航海英語GPS、DF及LC的使用單項選擇題每日一練(2019.01.17)

航海英語GPS、DF及LC的使用單項選擇題每日一練(2019.01.17)