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Small floes of rough,hummocky sea ice capable of damaging a vessel().

发布日期:2021-03-22

Small floes of rough,hummocky sea ice capable of d...
A

can usually be detected by radar in a smooth sea at a range of 4 to 6 kilometers

B

are indistinguishable from sea return on the PPI

C

are invisible to radar when covered with a thick layer of snow

D

are usually seen at night before they are close enough to provide a radar echo

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