航海英语狭水道、冰区与运河航行单项选择题每日一练(2019.01.26)

单项选择题
A SEA ROOM TO BE KEPT FOR SAFETY AROUND A VESSEL，ROCK，PLATFORM，ETC.，OR THE PLACE ASSIGNED TO A VESSEL WHEN ANCHORED OR LYING ALONGSIDE A PIER，ETC means（）.
A.Port
B.Commercial area
C.Berth
D.Roadstead
单项选择题
A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.
A.speed begins to drop
B.stops
C.receives ice damage
D.becomes icebound
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
单项选择题
A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）.
A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard
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