单项选择题
Ice blink is（）.
A.the dark appearance of the underside of a cloud layer due to reflection of a surface of open water
B.the soft light appearance on the underside of a cloud layer due to reflection from a surface of open water
C.the yellowish-white glare on the underside of a cloud layer
D.water sky
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相关考题
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单项选择题
For operations in pack ice，a vessel should（）.
A.be on an even keel
B.be trimmed slightly by the head
C.have a drag of not more than 60 - 90 centimeters
D.be ballasted so the forefoot is near the surface -
单项选择题
Before entering an ice area，the ship should be（）.
A.either trimmed by the head or the stern
B.on an even keel
C.trimmed down by the head
D.trimmed down by the stern -
单项选择题
Any vessel shall，if the circumstances of the case admit，avoid（）in a narrow channel.
A.anchor
B.to anchor
C.anchoring
D.to anchoring
