单项选择题
A.release it immediately B.attempt to beach it before it goes under C.pay out cable until it's on the bottom and place a buoy on the upper end D.shorten cable to keep it off the bottom
Ice blink is（）.A.the dark appearance of the underside o...
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
For operations in pack ice，a vessel should（）.A.be on an...
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
Before entering an ice area，the ship should be（）.A.eith...
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
