默认题库 - 狭水道、冰区与运河航行

单选题

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

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单选题

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 ster

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单选题

If a tow sinks in shallow water，you should（）.

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

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单选题

A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.

A. vessel's horsepower
B. sea state
C. number of propellers
D. vessel's displacement

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单选题

If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.

A. The towing line between the two vessels should be clear of the water
B. The towing line should be taut at all times between the vessels
C. There should be a catenary so the line dips into the water
D. None of the above

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单选题

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

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单选题

A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.

A. tow strain
B. catenary length
C. being in step
D. Williamson's Tow

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单选题

A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way? （）

A. The vessel moving upstream against the current
B. The vessel moving downstream with a following current
C. The vessel located more towards the channel centerline
D. The vessel with the least amount of maneuverability

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单选题

A vessel shall be deemed to be overtaking when she can see at night（）.

A. only the sternlight of the vessel
B. a sidelight and one masthead light of the vessel
C. only a sidelight of the vessel
D. any lights except the masthead lights of the vessel

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单选题

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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