航海英语(甲类船长)航行技术单选题练习1
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You are anchoring in a river where the current is from one direction only.The best way to lay out two anchors is to have them ______.
- A.Directly in line with the bow
- B.Side by side,with their lines on the port and starboard side
- C.So that their lines form an angle
- D.On top of one another
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Which statement is TRUE concerning equatorial tides ________.
- A.They occur when the Sun is at minimum declination north or south
- B.They occur when the Moon is at maximum declination north or south
- C.The difference in height between consecutive high or low tides is at a minimum
- D.They are used as the basis for the vulgar establishment of the port
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Which statement is TRUE concerning apogean tides ________.
- A.They occur only at quadrature
- B.They occur when the Moon is nearest the Earth
- C.They cause diurnal tides to become mixed
- D.They have a decreased range from normal
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A wave entering ______ is likely to produce bores.
- A.shallow water
- B.deep water
- C.river
- D.tide
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Tides are superimposed on nontidal rising and falling water levels,caused by ______.
- A.freshets
- B.floods
- C.river flows
- D.seismic events
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Which of the following are data layer categories to be displayed on ECDIS ________.
- A.ECDIS warnings and messages
- B.Hydrographic Office data
- C.Notice to Mariners information
- D.All of the above
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______ is not a type of tide.
- A.SEMIDIURNAL
- B.DIURNAL
- C.MIXED
- D.OSCILLATING
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Which statement concerning current is TRUE ________.
- A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positions
- B.The drift of the current should be averaged out on a one hour basis
- C.After the current is determined,it should not be used for further plotting because it is an unknown variable
- D.The distance between a simultaneous DR position and fix is equal to the drift of the current
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Which buoy will NOT display white retro reflective material ________.
- A.Safe water mark
- B.Isolated danger mark
- C.Preferred channel mark
- D.Daymark of no lateral significance
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When using horizontal sextant angles of three objects to fix your position,an indeterminate position will result in which situation ________.
- A.The objects lie in a straight line
- B.The vessel is inside of a triangle formed by the objects
- C.The vessel is outside of a triangle formed by the objects
- D.A circle will pass through your position and the three objects
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The recording fathometer produces a graphic record of the ______.
- A.bottom contour only up to depths of 100 fathoms
- B.depth underneath the keel against a time base
- C.contour of the bottom against a distance base
- D.depth of water against a distance base
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______ is not likely to be a methods of Traffic Separation.
- A.Separation of opposing streams of traffic by separation zones or lines
- B.The separation of through traffic from local traffic by provision of inshore traffic zones
- C.Division of traffic from several different direction into sectors
- D.Control of routing traffic through shipping routes
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In very high latitudes,the most practical chart projection is the ______.
- A.Mercator
- B.Gnomonic
- C.Azimuthal
- D.Lambert conformal
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When one upbound vessel is overtaking another vessel and both are pushing a tow ahead,what reaction may you expect ________.
- A.Both towheads will tend to drift apart,and the overtaking vessel will be slowed down
- B.Both towheads will tend to drift together,and the overtaking vessel will be slowed down
- C.Both towheads will tend to drift apart,and the overtaken vessel will be slowed down
- D.Both towheads will tend to drift together,and the overtaken vessel will be slowed down
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When making landfall at night,the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon.This light is called the ______.
- A.diffusion
- B.backscatter
- C.loom
- D.elevation
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You are heading into the sea during rough weather.Having too much weight forward can cause your small boat to ______.
- A.Broach
- B.Plunge into the wave
- C.Rise rapidly over the wave
- D.List
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You are doing a Williamson turn.Your vessel has swung about 60° from the original course heading.You should ______.
- A.Put the rudder amidships and check the swing
- B.Stop the engines and prepare to maneuver to pick up the man in the water
- C.Shift your rudder
- D.Increase to maximum speed
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You are in the process of adding a barge to your tow.A line run from your power capstan and around timber heads on your tow is made fast on the new barge so that it can be pulled into position.This line is called a ______.
- A.Scissors wire
- B.Capstan line
- C.Spring line
- D.Fore and aft line
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With a large tow astern,there is immediate danger to the tug in the event of the ______.
- A.Tug losing power
- B.Tow line parting
- C.Bridle twisting
- D.Tow broaching
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The ______ is used when a ship is moving forward at very slow speed due to minimal water flow over the rudder and the ship is not responding to helm.
- A.approach speed
- B.bow thrust
- C.transverse thrust
- D.kick ahead
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Your vessel is being assisted through an ice field in Thunder Bay by the Canadian Coast Guard icebreaker Alexander Henry.The starboard lookout reports that the icebreaker has run up the code flag N(November).What action should you take ________.
- A.Reduce speed
- B.Stop your engines
- C.Reverse your engines
- D.Stop your vessel instantly
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Your vessel is crossing a narrow channel.A vessel to port is within the channel and crossing your course.She is showing a black cylinder.What is your responsibility ________.
- A.Hold your course and speed
- B.Sound the danger signal
- C.Begin an exchange of passing signals
- D.Do not cross the channel if you might impede the other vessel
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Your vessel is proceeding down a channel,and you see a pair of range lights that are in line dead ahead.The chart indicates that the direction of this pair of lights is 229°T,and variation is 6°W.If the heading of your vessel at the time of the sighting is 232°per standard magnetic compass,what is the correct deviation ________.
- A.3°E
- B.9°E
- C.3°W
- D.9°W
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Which type of ice is a hazard to navigation ________.
- A.Ice rind
- B.Pancake ice
- C.Frazil ice
- D.Growlers
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You are on an ice-reinforced vessel about to enter packice.You should ______.
- A.enter the pack on the windward side where there is a well defined ice edge
- B.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement
- C.take maximum advantage of coastal leads caused by offshore winds
- D.look for areas of rotten ice and enter perpendicular to the ice edge
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Which statement about ships operating in ice is FALSE ________.
- A.Light and partly loaded ships should be ballasted as deeply as possible
- B.In brash-filled channels,operating with a shallow draft forward is most effective
- C.Traditionally,operating ships light in the ice has been effective in the spring
- D.Good searchlights should be available in the event of night navigation with or without icebreaker escort
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Which barge in your tow would require a cargo information card to be carried in the pilothouse ________.
- A.A tank barge with a sign reading No Visitors,No Smoking,No Open Lights
- B.An open hopper barge carrying coal
- C.A gas-free chlorine barge
- D.An empty(not gas-free)barge that last carried benzene
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The following conditions,except ______,require that vessels be towed through the entire Canal.
- A.vessels without mechanical motive power
- B.vessels with disabled machinery or bad steering
- C.vessels with dangerous cargoes on board
- D.vessels liable to become unmanageable for any other reason
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The maximum beam for commercial or non-commercial vessels and the integrated tug-barge combination acceptable for regular transit of Panama Canal is measured ______.
- A.at the outer surface of the shell plate
- B.between inner sides at mid-ship
- C.as the way for measuring molded beam breath
- D.at the summer draft of molded breath
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When operating in an area where sea ice and icebergs are present,which statement is TRUE ________.
- A.Icebergs may travel in a direction many degrees different from the sea ice
- B.Both icebergs and sea ice will move in approximately the same direction and at the same speed
- C.Icebergs and sea ice will move in the same direction,but at different speeds due to the sail effect of the berg
- D.Icebergs and sea ice will move in the same direction,but the iceberg will move slower because of its underwater bulk
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The amount of LFG that may be loaded into a given tank is determined by ______.
- A.Checking the loading sheet
- B.Loading to within 1 percent of outage
- C.Loading to within 10 percent of the safety relief valve setting
- D.Filling to the maximum level indicated on the liquid level gaging device
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In ice of higher concentrations ______ is not one of the basic applying rules.
- A.keep moving
- B.try to work with the ice movement,and not against it
- C.excessive speed means ice damage
- D.use full astern as often as possible
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______ is the most common cause of ice formation.
- A.The freezing of raindrops on contact with the vessel's structure
- B.Drastic fall in ambient temperature
- C.The deposit of water droplets on the vessel's structure
- D.Snowfall
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You are steaming in a westerly direction along the Gulf Coast.You see ahead of you a lighted buoy showing a red isophase light.Which action should you take ________.
- A.Alter course to port and leave the buoy to starboard
- B.Alter course to starboard and leave the buoy to port
- C.Alter course and leave the buoy near by on either side
- D.Alter course and pass the buoy well-off on either side
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You are sailing south on the Intracoastal Waterway(ICW)when you sight a green can buoy with a yellow square painted on it.Which of the following is TRUE ________.
- A.You should pass the buoy close aboard on either side
- B.The buoy marks the end of the ICW in that area
- C.You should leave the buoy to port
- D.The yellow square is retroreflective material used to assist in sighting the buoy at night
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You are running parallel to the coast and take a running fix using bearings of the same object.If you are making less speed than used for the running fix,in relation to the position indicated by the fix,you will be ______.
- A.Closer to the coast
- B.Farther from the coast
- C.On the track line ahead of the fix
- D.On the track line behind the fix
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You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast,the greatest safety margin from inshore dangers will result if what speed is used to determine _______.
- A.Minimum speed estimate
- B.Maximum speed estimate
- C.Average speed estimate
- D.A running fix should not be used under these conditions
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Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals ________.
- A.Approach charts
- B.General charts
- C.Sailing charts
- D.Coast charts
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You are making tow.A loaded,open-hopper barge with independent tanks has placards,with alternating red and white quadrants,located at each side and end.You inspect the barge and find slight traces of water in the wing voids due to condensation.What should you do?
- A.Refuse to accept the barge until all wing voids are dry
- B.Accept the barge and when weather conditions permit run with the wing voids open to ventilate the spaces
- C.Accept the barge and periodically check the wing voids
- D.Return the barge to the fleet and depart without the barge
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You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates ______.
- A.you are in the vicinity of the ICW
- B.the buoy is a special mark
- C.the buoy is off station
- D.the buoy designates a sharp turn in the channel
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Which effect does speed through the water have on a vessel which is underway in shallow water ________.
- A.A decrease in the speed results in a decrease in steering response and maneuverability
- B.An increase in speed results in the stern sucking down lower than the bow
- C.An increase in speed results in the vessel rising on an even plane
- D.A decrease in speed results in the vessel sucking down on an even plane
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When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind,the approach is best made ______.
- A.With bow out,stern in
- B.With bow in,stern out
- C.Parallel to the dock,as close in as possible
- D.Parallel to the dock,as far out as possible
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______ is not a type of IALA maritime buoyage system.
- A.special marks
- B.isolated danger marks
- C.cardinal marks
- D.fore and aft marks
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In the absence of a route leading from seaward,the conventional direction of buoyage generally follows ______.
- A.an anti-clockwise direction around land masses
- B.a clockwise direction around land masses
- C.an anticlockwise direction around sea masses
- D.a clockwise direction around sea masses
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You are proceeding down a channel and lose the engine(s).You must use the anchors to stop the ship.Which statement is true ________.
- A.Pay out all of the cable before setting up on the brake to insure the anchors dig in and hold
- B.For a mud,mud and clay,or sandy bottom pay out a scope of 5 to 7 times the depth before setting up on the brake
- C.Use one or both anchors with a scope of twice the depth before setting the brake
- D.Drop the anchor to short stay and hold that scope
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You are planning to anchor in an area where several anchors have been lost due to fouling.As a precaution,you should ______.
- A.anchor using both anchors
- B.anchor with scope of 8 or more to 1
- C.use a stern anchor
- D.fit a crown strap and work wire to the anchor
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You are making a sharp turn in a channel and using a buoy four points on the bow to gauge your rate of turn.If you observe the buoy moving aft relative to you,what should you do ________.
- A.Increase the rate of turn
- B.Decrease the rate of turn
- C.Maintain a constant rate of turn
- D.Decrease speed
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You are entering port and have been instructed to anchor,as your berth is not yet available.You are on a SW'ly heading,preparing to drop anchor,when you observe the range lights as shown on your starboard beam.You should ______.
- A.not drop the anchor until the lights are in line
- B.ensure your ship will NOT block the channel or obstruct the range while at anchor
- C.drop the anchor immediately as the range lights mark an area free of obstructions
- D.drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor
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You are docking a vessel in a slip which has its entrance athwart the tide.You land the ship across the end of the pier,stemming the tide,preparatory to breaking the ship around the corner.You have one tug to assist.Where would you generally tie up the tug ________.
- A.Have her on a hawser from the stern
- B.Tie her up on the inshore bow to hold the ship off the end
- C.Tie her up on the offshore bow
- D.Tie her up on the inshore quarter to lift the stern
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You are anchoring in 16 fathoms of water.On a small to medium size vessel,the ______.
- A.Anchor may be dropped from the hawse pipe
- B.Anchor should be lowered to within 2 fathoms of the bottom before being dropped
- C.Scope should always be at least ten times the depth of the water
- D.Scope should always be less than 5 times the depth of the water
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You are approaching the pilot station with the wind fine on the starboard bow and making about 3 knots.You can help to calm the seas by taking what action just before the pilot boat comes along on the port side ________.
- A.Backing full
- B.Stopping the engines
- C.Giving right full rudder
- D.A short burst of ahead full with left full rudder
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When weighing anchor in a rough sea,how would you avoid risk of damaging the bow plating ________.
- A.Heave it home as fast as you can
- B.Heave it home intermittently,between swells
- C.Leave the anchor under foot,until the vessel may be brought before the sea
- D.Wait for a calm spot between seas,then house it
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When dropping anchor,you are stationed at the windlass brake.The most important piece(s)of gear is(are)______.
- A.A hard hat
- B.A long sleeve shirt
- C.Gloves
- D.Goggles
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When turning a ship in restricted space with a strong wind,it is normally best to ______.
- A.Go ahead on both engines with the rudder hard to one side,if on a twin-screw vessel
- B.Back down with the rudder hard to one side,if on a single-screw vessel
- C.Take advantage of the tendency to back to port,if on a twin-screw vessel
- D.Turn so that the tendency to back into the wind can be used,if on a single-screw vessel
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Wale shores would be used when drydocking a vessel with ______.
- A.Tumble home
- B.Excessive deadrise
- C.Excessive trim
- D.A list
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What effect is achieved from soaking an anchor ________.
- A.It allows the bottom soil to consolidate
- B.It gives the palms time to trip the anchor
- C.It stabilizes the mooring system
- D.It lubricates the anchor for better tripping
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The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through.What should you be most concerned with ________.
- A.A downbound vessel
- B.An upbound vessel
- C.Current reaction when the lock chamber is being emptied
- D.Current reaction when the lock chamber is being filled
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The safest device used to secure the end of the pendant wire when it is initially passed to the anchor handling vessel is a ______.
- A.Pelican hook
- B.Hydraulic deck stopper
- C.Connecting link
- D.Shackle
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The ship ______ on a low rock was broken in two by the waves.
- A.That had been driven
- B.Had been driven
- C.Have been driven
- D.Which to have been driven
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The centre of lateral resistance is ______.
- A.the center of the hydrodynamic forces acting on the underwater hull to resist the effect of the wind
- B.the point of influence of wind on the ship
- C.the pivot point
- D.the point on the ship's above-water structure upon which the whole force of the wind can be considered an act
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The length of chain between the anchor and the end of the pendant line is called the ______.
- A.Pigtail chain
- B.Thrash chain
- C.Crown chain
- D.Wear chain
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All the following is true except that ______.
- A.in many places a counter current flows in opposition to the main current close to the bank
- B.current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind
- C.as speed is reduced,the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions
- D.when close to the berth in a head current,there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
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That ______ is not caused by shallow water.
- A.turning ability deteriorates
- B.virtual mass increases
- C.the effect of the propeller transverse thrust on yaw alters
- D.the ship will turn with its head towards the wind
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A ship will always want to settle into a position where ______.
- A.the pivot point and point of influence of wind in are not in alignment
- B.the pivot point and point of influence of wind in are in alignment
- C.the point of influence of wind moves depending on the profile of the ship presented to the wind
- D.the ship steams slowly in rough seas
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A check line is ______.
- A.A safety line attached to a man working over the side
- B.Used to measure water depth
- C.Used to slow the headway of a barge
- D.Used to measure the overhead height of a bridge