A vessel hearing a fog signal forward of her beam has not determined if risk of collision exists. She shall reduce speed to（）.

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• Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）

  A . When at anchor，the pilot vessel is only required to sound anchor signals B . The identification signal must be sounded any time the pilot vessel is underway C . The pilot vessel may only sound the identity signal when making way D . All of the above

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• Which vessel is the stand-on vessel when two vessels crossing in fog are NOT in sight of one another（）.

  A . The vessel which has the other on her own starboard side B . The vessel which has the other on her own port side C . The one which hears the other's fog signal first D . Neither vessel is the stand-on vessel

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• Your vessel is approaching a bend. You hear a prolonged blast from around the bend. You should （）.

  A . back your engines B . stop your engines and drift C . answer with one prolonged blast D . sound the danger signal

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• A 200-meter vessel is aground in fog. Which signal is optional? （）

  A . A bell signal B . A gong signal C . A whistle signal D . All of the above

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• Advection fog may be formed by cold air passing over a（）.

  A . colder sea surface B . warmer sea surface C . dry coastal plains D . high mountain or plateau

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• Fog is most commonly associated with a(n)（）.

  A . warm front at night B . low pressure area C . anticyclone D . lack of frontal activity

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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（）.

  A . stop your engines B . sound two prolonged blasts of the whistle C . sound the danger signal D . slow to bare steerageway

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• The wind is ESE，and a sailing vessel is steering NW. Which fog signal should she sound?（）

  A . One blast at one-minute intervals B . One blast at two-minute intervals C . Two blasts at one-minute intervals D . One prolonged and two short blasts at two-minute interval

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• While underway，in fog，you hear a whistle signal of one prolonged blast followed by two short blasts. This signal is sounded by a vessel（）.

  A . not under command B . being towed C . on pilotage duty D . aground

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• While underway in thick fog you are on watch and hear the cry“man overboard”.Which type of maneuver should you make（）.

  A . Figure eight turn B . Round turn C . Racetrack turn D . Williamson tur

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• If your vessel is underway in fog and you hear one prolonged and three short blasts，this is a （）.

  A . vessel not under command B . sailing vessel C . vessel being towed (manned) D . vessel being towed (unmanned)

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• If you hear the firing of a gun at one minute intervals from another vessel，this indicates that（）.

  A . the gun is being used to sound passing signals B . the vessel is in distress C . all vessels are to clear the area D . all is clear and it is safe to pa

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• Which one of two crossing power-driven vessels has the right of way in a fog（）.

  A、 Both vessels B、 Neither vessel C、The vessel on portside D、  The vessel on starboard side

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• Every vessel shall（）maintain a proper look-out by sight and hearing as well as by all available means appropriate in prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.

  A . in fog B . at night C . in narrow fairway D . at all time

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• A 200-meter vessel restricted in her ability to maneuver，at anchor，will sound a fog signal of（）.

  A . a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minute B . one prolonged followed by two short blasts every 2 minutes C . one prolonged followed by three short blasts every minute D . one prolonged followed by three short blasts every 2 minute

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• You hear the fog signal of another vessel forward of your beam.Risk of collision may exist.You MUST（）.

  A . Reduce speed to bare steerageway B . Stop your engines C . Begin a radar plot D . All of the above

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• A tug is towing three manned barges in line in fog. The first vessel of the tow should sound （）.

  A . no fog signal B . one short blast C . one prolonged and three short blasts D . one prolonged，one short，and one prolonged blast

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• All fog signals shall be sounded every two minutes with the exception of a vessel（）.

  A . underway or making way B . under sail or under tow C . anchored or aground D . not under command or restricted in her ability to maneuver

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• A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.

  A . a 2-second blast every 20 seconds B . a 4-second blast every 20 seconds C . an 8-second blast every 30 seconds D . a 10-second blast every 30 second

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• In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should（）.

  A . stop your engines B . sound the danger signal at two-minute intervals C . hold course and speed until the other vessel is sighted D . take avoiding action as soon as possible

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• We shall send a（）to the bow. Because the fog is too thick.

  A . watchman B . look-out C . look out D . looker

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• Through the effects of smog-which is a mixture of smoke fog.

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• 24. If your vessel is underway in fog and you hear one prolonged and three short blasts, this is a ______

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• In Britain, when there is no fog, the use of fog lights is an offence, for ------receive a $ 30 fine.you may

  A．what B． which C． those D． that

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