In restricted visibility, a vessel which detects by radar alone the presence of another vessel shall determine if a close quarters situation is developing or risk of collision exists. If so, she shall（）.

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  A . A vessel transferring provisions while underway B . A pushing vessel and a vessel being pushed when connected in a composite unit C . A vessel servicing a navigation mark D . A vessel launching aircraft

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• Which vessel is NOT classified as “restricted in her ability to maneuver”? （）

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• You are Master of a towing vessel engaged in towing three barges astern.The middle barge of the tow would be required to sound which of the following during restricted visibility （）.

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• What determines if a vessel is restricted in her ability to maneuver?（）.

  A . Whether or not all of the vessel's control equipment is in working order B . The vessel's draft in relation to the available depth of water C . Whether the nature of the vessel's work limits maneuverability required by the Rules D . Whether or not the vessel is the give-way vessel in a meeting situatio

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• You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.

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• The steering and sailing rules for vessels in restricted visibility apply to vessels（）.

  A . in sight of one another in fog B . navigating in or near an area of restricted visibility C . only if they are showing special purpose lights D . only if they have operational radar

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• When visibility is restricted（），we can say it is restricted visibility.

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• All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.

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• During this season each year the visibility in the abovementioned area is（）.

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• It is danger for vessels without the use of（）to approach the estuary in such poor visibility.

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• A power-driven vessel shall have her engine ready for（）when the visibility is restricted.

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• Which statement concerning maneuvering in restricted visibility is FALSE?（）.

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• In restricted visibility the speed of a vessel without operational radar may be（）enable effective avoiding action to be taken on sighting another ship.

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• When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

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