Deck_2014 : Deck General - 844/2572
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| Small floes of rough, hummocky sea ice capable of damaging a vessel ___________________ . |
| 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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