航海英語航海儀器使用說明書單項(xiàng)選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.

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2 An ECDIS is required to display which information?（）

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3 （）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.

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4 （）should be used during the poor visibility if the radar’s screen shows heavy sea returns.

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5 There is a possibility that small vessel，ice and other floating objects may not be（）by radar at an adequate range.

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