航海英語(yǔ)遇險(xiǎn)用語(yǔ)單項(xiàng)選擇題每日一練(2019.01.19)

來(lái)源：考試資料網(wǎng)

1 Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when（）.

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2 The color of rockets，shells，or rocket parachute flares used to indicate that the vessel is in distress and requires immediate assistance is（）.

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3 What is NOT a distress signal?（）.

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4 A distress signal（）.

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5 By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）

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