ATON   Aids to Navigation  

This is a old test from one of sea school oupv course.

 

 

1.         Under the US Aids to Navigation System, spherical buoys may be

            A.         numbered

            B.         lettered

            C.         lighted

            D.        all the above

 

2.         The light rhythm or Morse (A) is shown on

            A.         preferred channel buoys

            B.         starboard or port-side buoys

            C.         special marks

            D.         safe water buoys

 

3.         When outboard from a U.S. port, a buoy displaying a flashing red light indicates

            A.         a junction with a preferred channel to the left

            B.         a sharp turn in the channel to the right

            C.         the port side of the channel

            D.         a wreck to be left on the vessel’s starboard side

 

4.         How is the intensity of a light expressed in the Light List?

            A.         Luminous range

            B.         Geographic range

            C.         Nominal range

            D.        Meteorological range

 

            5.         Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

                        A.         the position of underwater cables

                        B.         a hazard to navigation

                        C.         the port side of the channel

                        D.         safe water

 

            6.         Luminous range is the

                        A.         maximum distance at which a light may be seen in clear weather

                        B.         maximum distance at which a light may be seen under existing visibility conditions

                        C.         maximum distance at which a light may be seen considering the height of

                                     the light and the height of the observer

                        D.         the average distance of visibility of the light

 

            7.         A daymark used to indicate the safe water in a channel will have the shape indicated by which letter in illustration  D045NG

                        A.         A

                        B.         B

                        C.         C

            D.        D

 

 

 

 

8.         A mooring buoy, if lighted, show which color light

            A.         Yellew

            B.         White

            C.         Blue

            D.         any color except red or green

 

9.         Repeat of 2

 

10.       What is a lighted safe water mark filled with to aid in its identification?

            A.         A spherical topmark

            B.         Red and white retro-reflective material

            C.         A sequential number

            D.        A red and white octagon

 

11.       Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic

            A.         Flashing

            B.         Quick flashing

            C.         Composite group flashing

            D.         Equal interval (isophase)

 

12        A special purpose buoy shall be

            A.         lighted with a white light

            B.         striped black and red

            C.         lighted with a red light

            D.        yellow

 

13        If several fixed navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List

            A.         Rhythm

            B.         Period

            C.         Intensity

            D.         Color

 

14        What is TRUE concerning new editions of Light List

            A.         Supplements to new editions are issued monthly by the US Coast Guard

            B.         New editions are published by the National Ocean Survay

            C.         New editions are corrected through the date shown on the title page

            D.         None of the above

 

15        Under the Aids to Navigation System, a yellow buoy is a

            A.         safe water buoy

            B.         junction buoy

            C.         cardinal mark

            D.        special purpose mark

 

 

 

 

 

 

16        When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the

            A.         color of the aid

            B.         shape of the odd

            C.         color of the top band

            D.        shape of the yellow mark

 

17        A daymark warning of a danger will have the shape indicated by what letter in illustration D045NG

            A.         A

            B.         B

            C.         C

            D.        D

 

18        The buoy indicated by the letter A in illustration D044NG is a

            A.         nun

            B.         can

            C.         spar

            D.         pillar

 

19        Which of the buoy symbols in illustration D032NG indicates a safe water mark

            A.         D

            B.         C

            C.         B

            D.         A

 

20        A lighted buoy to be left to starboard when entering a U.S. port from seaward shall have a

            A.         white light

            B.         red light

            C.         green light

            D.        light characteristic of Morse (A)

 

21        A survey (special purpose mark) buoy

            A.         must be lighted

            B.         may have a flashing red light

            C.         may have a fixed white light

            D.        None of the above

 

22        Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

            A.         the position of underwater cable

            B.         a hazard to navigation

            C.         the port side of a channel

            D.        safe water

 

23        The period of a lighted aid to navigation refers to the

            A.         date of construction or establishment

            B.         length of time between flashes of the light

            C.         time required for the longest flash of each cycle

            D.         the time required for the light to complete each cycle

 

 

 

24        A white buoy marked with an orange rectangle indicates

            A.         mid-channel

            B.         a fish net area

            C.         general information

            D.         an anchorage

 

25        The Light List indicates that a dayboard is a type NB.  You should

            A.         see a black triangle

            B.         look for another daymark forming a range

            C.         except a daymark of no lateral significance

            D.        check to enter the correct channel at the junction daymark

 

26        A nun buoy is indicated by which letter in illustration D044NG

            A.         A

            B.         B

            C.         C

            D.         D

 

27        What daymark has no lateral significance

            A.         Red triangle

            B.         Red and white octagon

            C.         Green and white diamond

            D.         Green square

 

28        Which light characteristic can be used on a special purpose mark

            A.         Fixed

            B.         Occulting

            C.         Equal interval

            D.        Quick flashing

 

29        Private aids to navigation in or along navigable waters of the United States may be listed in the

            A.         Sailing Direction

            B.         Light List

            C.         List of Private aids

            D.        Aids to Navigation Manual

 

30.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top band

            C.         the location of the buoy in the channel junction

            D.         the characteristic of the buoy’s light

 

31.       You are outbound in a buoyed channel on course 015 degrees T.  You sight a white light showing a Morse (A) characteristic bearing 359 degrees relative .  

            For safety, you should

            A.         change course to 359 degrees T to pass near to the buoy

            B.         stay in the channel and leave the buoy to port

            C.         alter course to  000 degrees T and leave the buoy well clear to starboard

            D.        check the chart to see where the marked danger lies in relation to the buoy

 

 

 

32.       Geographic range is the maximum distance at which a light may be seen under

            A.         existing visibility conditions, limited only by the curvature of the Earth

            B.         perfect visibility conditions, limited only by the curvature of the Earth

            C.         existing visibility conditions, limited only by the intensity of the light

            D.        perfect visibility conditions, limited only by interference from background lighting

 

33.       The channel under a bridge is marked with lights of the lateral system.  

            The bridge piers adjacent to the channel shall be marked with

            A.         occulting white lights

            B.         yellow lights

            C.         fixed white lights

            D.         flashing blue lights

 

34.       As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys

            A.         decrease and buoys are black

            B.         increase and the buoys are green

            C.         decrease and the buoys are red

            D.        increase and the buoys are red

 

35.       What daymark shape is used in the lateral system?

            A.         Semicircle

            B.         Triangle

            C.         Pentagon

            D.        Diamond

 

36.       On navigational aids, what does the light characteristic “Fl (2+ 1)” mean?

            A.         A flashing light combined with a fixed light of greater brightness

            B.         Light flashes combined in groups, with a different number of flashes in each group

            C.         A light showing groups of two or more flashes at regular intervals

            D.        A fixed light varied at regular intervals by groups of two or more flashes of greater brightness

 

37.       Which light characteristic can be used on a special purpose mark?

            A.         Fixed

            B.         Occulting

            C.         Equal interval

            D.        Quick flashing

 

38.       A Buoy marking a wreck will show a(n)

            A.         white light FL (2) and a topmark of 2 black spheres

            B.         occulting green light and may be lettered

            C.         yellow light and will be numbered

            D.        continuous quick white light and may be numbered

 

39.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top band

            C.         the location of the buoy in the channgel junction

            D.        the characteristic of the buoy’s light

 

 

 

40.       In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark

            A.         channels for shallow draft vessels

            B.         general anchorage areas

            C.         fishing grounds

            D.        junctions or bifurcations

 

41.       When displayed under a single-span fixed bridge, red lights indicate

            A.         the channel boundaries

            B.         that vessels must stop

            C.         the bridge is about to open

            D.        the traffic is approaching from the other side

 

42.       A light characteristic of composite group flashing indicates that there is a(n)

            A.         sharp turn in the channel

            B.         narrowing in the channel at that point

            C.         junction in the channel

            D.        obstruction that must be left to port

 

43.       A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw.  Which signal

            indicates that the draw will not be open immediately.

            A.         a flashing amber light

            B.         a fixed red light

            C.         a white flag raised and lowered vertically

            D.         a flashing white light

 

44.       A white diamond daymark with an orange border is a(n)

            A.         special mark

            B.         information or regulatory mark

            C.         lateral aid on the intracoastal waterway

            D.         safe water mark

 

45.       Which light characteristic can be used on a special purpose mark

            A.         Fixed

            B.         occulting

            C.         equal intervals

            D.         quick flashing

 

46.       Buoys are marked with reflective material to assist in their detection by searchlight.

            Which statement is TRUE?

            A.         A safe water buoy will display red and white vertical stripes or reflective material

            B.         All reflective material is white because it is most visible at night

            C.         A special purpose mark will display either red or green reflective material to agree with its shape

            D.        A preferred channel buoy displays either red or green reflective material to agree with the top

                         band of color

 

47.       Duplicate of #34

 

 

 

 

 

48.       Under the U.S. Aids to Navigation System, a yellow buoy may

            A.         mark a fishing net area

            B.         be lighted with a white light

            C.         show a fixed red light

            D.        all of the above 

 

49.       Which symbol in illustration D015NG would indicate a large automated navigational buoy, such as those

            that have replaced some lightship?

            A.         A

            B.         B

            C.         C

            D.        D

 

50.       The normal range of a light may be accurately defined as the maximum distance at which a light may be

            seen.

            A.         Under existing visibility conditions

            B.         Under perfect visibility

            C.         Within ten miles visibility

            D.        With fifteen miles visibility

 

51.       Some lights used as aids to marine navigation have a red sector to indicate a danger area.  How are the

            limits of a colored sector of light listed in the Light List?

            A.         Geographical positions outlining the area of the sector

            B.         True bearings as observed from the light towards a vessel

            C.         True bearings as observed from a vessel towards the light

            D.         Bearings given in the Light List are always magnetic

 

52.       Under the U.S. Aids to Navigation System spherical buoys may be

            A.         numbered

            B.         lettered

            C.         lighted

            D.         all of the above

 

53.       A special purpose buoy

            A.         must be lighted

            B.         may have a flashing red light

            C.         may have a fixed white light

            D.        may have a fixed yellow light

 

54.       Which agency maintains federal aids to navigation?

            A.         Corps of Engineers

            B.         Coast Guard

            C.         National Ocean Service

            D.         Maritime Administration

 

55.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top bands

            C.         the location of the buoy in the channel junction

            D.         the characteristic of the buoys light

 

56.       A safe water mark may be

            A.         vertically striped

            B.         spherical

            C.         showing a white light

            D.         all of the above

 

57.       A vessel’s position should be plotted using bearings of

            A.         buoys close at hand

            B.         fixed known objects on shore

            C.         buoys at a distance

            D.        all of the above

 

58.       Which symbol represents a twenty-fathom curve?

            A.         _.._.._.._..

            B.         -- -- -- -- --

            C.         .--.--.--.

            D.        ---------

 

59.       The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as

            A.         gains are made over the single path

            B.         a result of variation and propagation conditions

            C.         the frequency of the pulses increases

            D.         the stations shift pulses

 

60.       What agencies of the U.S. government issues charts of U.S. waters and coast pilots?

            A.         National Ocean Services

            B.         Defense Mapping Agency

            C.         U.S. Coast Guard

            D.        U.S. Naval Observatory

 

61        Most modern Loran-C receivers automatically detect station blink which

            A.         indicates the station is transmitting normally

            B.         automatically shuts down the receiver

            C.         triggers alarm indicators to warn the operator

            D.        causes the receiver to shift automatically to another Loran chain

 

62        Which would influence a magnetic compass?

            A.         Electrical wiring

            B.         Iron pipe

            C.         Radio

            D.        All of the above

 

63        A vessel position should be plotted using bearings of

            A.         buoys close at hand

            B.         fixed known objects on shore

            C.         buoys at a distance

            D.        All of the above

 

 

 

 

64        Loran-C receivers automatically detect station blink which

            A.         indicates the station is transmitting normally

            B.         automatically shuts down the receiver

            C.         indicates unreliability of the navigational information

            D.         causes the receiver to shift automatically to another Loran chain

 

65        On charts of U.S. waters, a magenta marking is NOT used for marking a

            A.         5-fathom curve

            B.         prohibited area

            C.         lighted buoy

            D.        radiobeacon

 

66        The annual change in variation for an aera can be found in

            A.         the handbook for Magnetic Compass Adjustment, Pub 226

            B.         the center of the compass rose on a chart of the area

            C.         the compass deviation table

            D.       variation dose not change

 

67        The lubber’s line on a magnetic compass indicates

            A.         compass north

            B.         the direction of the vessel’s heading

            C.         magnetic north

            D.        a relative bearing taken with an azimuth circle

 

68        Information for updating nautical charts is primarily found in the

            A.         Notice to Mariners

            B.         Coast Pilots

            C.         nautical chart catalogs

            D.        Sailing Directions

 

69        In the Loran-C configuration shown in illustration D003NG, the stations located at X Y, and Z are called

            A.         repeater stations

            B.         secondary stations

            C.         composite stations

            D.        alternate stations

 

70        What publication has information on the climate, distances, navigation regulations, outstanding landmarks, 

            channel and anchorages of Long Island Sound?

            A.         Light List

            B.         Coast Pilot

            C.         Sailing Directions

            D.         Pilot Chart

 

71        Variation is the angular measurement between

            A.         compass north and magnetic north

            B.         compass north and true north

            C.         Magnetic meridian and the geographic

            D.        your vessel’s heading and magnetic meridian

 

 

72        A compass card without north seeking capability that is used for relative bearings is a(n)

            A.         bearing circle

            B.         pelonus

            C.         bearing bar

            D.         alidade

 

73        Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?

            A.         Salinity of water

            B.         Temperature of water

            C.         Atmospheric pressure

            D.        Type of bottom

 

74        The lubber line of a magnetic compass

            A.         always shows true north direction

            B.         indicates the vessel’s heading

            C.         is always parallel to the vessel’s transom

            D.        is located on the compass card

 

75        Magnetic information on a chart may be

            A.         found in the center(s) of the compass rose(s)

            B.         indicated by isogonic lines

            C.         found in a note on the chart

            D.         All of the above

 

76        In which source could you find the number of a chart for a certain geographic area?

            A.         Chart No. 1

            B.         Catalog of Nautical Charts

            C.         American Practical Navigator

            D.        U.S. Coast Guard Light List

 

77        Blinking of a Loran-C signal indicates

            A.         the signal is in proper sequence

            B.         there will be no increase or decrease in kHz

            C.         there is an error in the transmission of that signal

            D.        that it has the proper GRI

 

78        The scale on a chart is given as 1:5,000,000.  This means that

            A.         1 inch is equal to 5,000 inches on the Earth’s surface

            B.         1 nautical mile on the chart is equal to 5,000 inches on the Earth’s surface

            C.         1 inch is equal to 5,000,000 inches on the Earth’s surface

            D.        1 nautical mile on the chart is equal to 5,000,000 inches on the Earth’s surface

 

79        Which aid is NOT marked on a chart with a magenta circle?

            A.         Radar station

            B.         Aero light

            C.         Radiobeacon

            D.         Radar transponder beacon

 

 

 

 

80        What should you apply to a fathometer reading to determine the depth of water?

            A.         Subtract the draft of the vessel.

            B.         Add the draft of the vessel.

            C.         Subtract the seawater correction

            D.         Add the seawater correction

 

81        Loran-C is which type of system?

            A.         Reflected electron

            B.         Electrical radiation

            C.         Quarterpoint electrical navigation

            D.        Hyperbolic radio navigation

 

82        The difference between magnetic heading and compass heading is called

            A.         Variation

            B.         Deviation

            C.         Compass error

            D.        Drift

 

83        The error in a magnetic compass caused by the vessel’s magnetism is called

            A.         Variation

            B.         Deviation

            C.         Compass error

            D.        Bearing error

 

84        The annual change in variation for an area can be found in

            A.         The handbook for magnetic compass adjustment

            B.         The center of a compass rose on a chart of the area

            C.         The compass deviation table

            D.        Variation does not change

 

85        DMAHTC charts are adopting the metric system.  In order to change a charted depth in meters to feet you

            should use the conversion table found

            A.         In the Light List

            B.         In Bowditch Vol II

            C.         On the chart

            D.        All of the above

 

86        What agency of the U.S. Government issues charts of the U.S. waters and Coast Pilots?

            A.         National Ocean Service

            B.         Defense Mapping Agency

            C.         U.S. Coast Guard

            D.         U.S. Naval Observatory

 

87        Lines of Position may be

            A.         Hyperboles

            B.         Straight lines

            C.         Arcs

            D.         All of the above

 

 

 

88        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

 

89        A line of position may be

            A.         Hyperboles

            B.         Arcs

            C.         Straight lines

            D.         Any of the above

 

 

 

 

 

 

 

 

Answers

 

 

1.         Under the US Aids to Navigation System, spherical buoys may be

            A.         numbered

            B.         lettered

            C.         lighted

            D.        all the above

 

2.         The light rhythm or Morse (A) is shown on

            A.         preferred channel buoys

            B.         starboard or port-side buoys

            C.         special marks

            D.        safe water buoys

 

3.         When outboard from a U.S. port, a buoy displaying a flashing red light indicates

            A.         a junction with a preferred channel to the left

            B.         a sharp turn in the channel to the right

            C.        the port side of the channel

            D.        a wreck to be left on the vessel’s starboard side

 

4.         How is the intensity of a light expressed in the Light List?

            A.         Luminous range

            B.         Geographic range

            C.        Nominal range

            D.        Meteorological range

 

            5.         Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

                        A.         the position of underwater cables

                        B.         a hazard to navigation

                        C.         the port side of the channel

                        D.        safe water

 

            6.         Luminous range is the

                        A.         maximum distance at which a light may be seen in clear weather

                        B.         maximum distance at which a light may be seen under existing visibility conditions

                        C.         maximum distance at which a light may be seen considering the height of

                                    the light and the height of the observer

                        D.        the average distance of visibility of the light

 

            7.         A daymark used to indicate the safe water in a channel will have the shape indicated by which letter in             illustration  D045NG

                        A.         A

                        B.         B

                        C.        C

            D.        D

 

 

 

 

8.         A mooring buoy, if lighted, show which color light

            A.         Yellew

            B.         White

            C.         Blue

            D.        any color except red or green

 

9.         Repeat of 2

 

10.       What is a lighted safe water mark filled with to aid in its identification?

            A.        A spherical topmark

            B.         Red and white retro-reflective material

            C.         A sequential number

            D.        A red and white octagon

 

11.       Buoys which only mark the left or right side of the channel will never exhibit a light with which             characteristic

            A.         Flashing

            B.         Quick flashing

            C.        Composite group flashing

            D.        Equal interval (isophase)

 

12        A special purpose buoy shall be

            A.         lighted with a white light

            B.         striped black and red

            C.         lighted with a red light

            D.        yellow

 

13        If several fixed navigational lights are visible at the same time, each one may be positively identified by             checking all of the following EXECPT what against the Light List

            A.         Rhythm

            B.         Period

            C.        Intensity

            D.        Color

 

14        What is TRUE concerning new editions of Light List

            A.         Supplements to new editions are issued monthly by the US Coast Guard

            B.         New editions are published by the National Ocean Survay

            C.        New editions are corrected through the date shown on the title page

            D.        None of the above

 

15        Under the Aids to Navigation System, a yellow buoy is a

            A.         safe water buoy

            B.         junction buoy

            C.         cardinal mark

            D.        special purpose mark

 

 

 

 

 

 

16        When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided     by the

            A.         color of the aid

            B.         shape of the odd

            C.         color of the top band

            D.        shape of the yellow mark

 

17        A daymark warning of a danger will have the shape indicated by what letter in illustration D045NG

            A.         A

            B.         B

            C.         C

            D.        D

 

18        The buoy indicated by the letter A in illustration D044NG is a

            A.         nun

            B.         can

            C.         spar

            D.        pillar

 

19        Which of the buoy symbols in illustration D032NG indicates a safe water mark

            A.        D

            B.         C

            C.         B

            D.        A

 

20        A lighted buoy to be left to starboard when entering a U.S. port from seaward shall have a

            A.         white light

            B.         red light

            C.         green light

            D.        light characteristic of Morse (A)

 

21        A survey (special purpose mark) buoy

            A.         must be lighted

            B.         may have a flashing red light

            C.         may have a fixed white light

            D.        None of the above

 

22        Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

            A.         the position of underwater cable

            B.         a hazard to navigation

            C.         the port side of a channel

            D.        safe water

 

23        The period of a lighted aid to navigation refers to the

            A.         date of construction or establishment

            B.         length of time between flashes of the light

            C.         time required for the longest flash of each cycle

            D.        the time required for the light to complete each cycle

 

 

 

24        A white buoy marked with an orange rectangle indicates

            A.         mid-channel

            B.         a fish net area

            C.        general information

            D.        an anchorage

 

25        The Light List indicates that a dayboard is a type NB.  You should

            A.         see a black triangle

            B.         look for another daymark forming a range

            C.        except a daymark of no lateral significance

            D.        check to enter the correct channel at the junction daymark

 

26        A nun buoy is indicated by which letter in illustration D044NG

            A.         A

            B.         B

            C.         C

            D.        D

 

27        What daymark has no lateral significance

            A.         Red triangle

            B.         Red and white octagon

            C.        Green and white diamond

            D.        Green square

 

28        Which light characteristic can be used on a special purpose mark

            A.        Fixed

            B.         Occulting

            C.         Equal interval

            D.        Quick flashing

 

29        Private aids to navigation in or along navigable waters of the United States may be listed in the

            A.         Sailing Direction

            B.         Light List

            C.         List of Private aids

            D.        Aids to Navigation Manual

 

30.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top band

            C.         the location of the buoy in the channel junction

            D.        the characteristic of the buoy’s light

 

31.       You are outbound in a buoyed channel on course 015 degrees T.  You sight a white light showing a             Morse (A) characteristic bearing 359 degrees relative .  For safety, you should

            A.         change course to 359 degrees T to pass near to the buoy

            B.         stay in the channel and leave the buoy to port

            C.         alter course to  000 degrees T and leave the buoy well clear to starboard

            D.        check the chart to see where the marked danger lies in relation to the buoy

 

 

 

32.       Geographic range is the maximum distance at which a light may be seen under

            A.         existing visibility conditions, limited only by the curvature of the Earth

            B.         perfect visibility conditions, limited only by the curvature of the Earth

            C.         existing visibility conditions, limited only by the intensity of the light

            D.        perfect visibility conditions, limited only by interference from background lighting

 

33.       The channel under a bridge is marked with lights of the lateral system.  The bridge piers adjacent

            to the channel shall be marked with

            A.         occulting white lights

            B.         yellow lights

            C.         fixed white lights

            D.        flashing blue lights

 

34.       As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys

            A.         decrease and buoys are black

            B.         increase and the buoys are green

            C.         decrease and the buoys are red

            D.        increase and the buoys are red

 

35.       What daymark shape is used in the lateral system?

            A.         Semicircle

            B.         Triangle

            C.         Pentagon

            D.        Diamond

 

36.       On navigational aids, what does the light characteristic “Fl (2+ 1)” mean?

            A.         A flashing light combined with a fixed light of greater brightness

            B.         Light flashes combined in groups, with a different number of flashes in each group

            C.         A light showing groups of two or more flashes at regular intervals

            D.        A fixed light varied at regular intervals by groups of two or more flashes of greater brightness

 

37.       Which light characteristic can be used on a special purpose mark?

            A.        Fixed

            B.         Occulting

            C.         Equal interval

            D.        Quick flashing

 

38.       A Buoy marking a wreck will show a(n)

            A.        white light FL (2) and a topmark of 2 black spheres

            B.         occulting green light and may be lettered

            C.         yellow light and will be numbered

            D.        continuous quick white light and may be numbered

 

39.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top band

            C.         the location of the buoy in the channgel junction

            D.        the characteristic of the buoy’s light

 

 

 

40.       In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark

            A.         channels for shallow draft vessels

            B.         general anchorage areas

            C.         fishing grounds

            D.        junctions or bifurcations

 

41.       When displayed under a single-span fixed bridge, red lights indicate

            A.        the channel boundaries

            B.         that vessels must stop

            C.         the bridge is about to open

            D.        the traffic is approaching from the other side

 

42.       A light characteristic of composite group flashing indicates that there is a(n)

            A.         sharp turn in the channel

            B.         narrowing in the channel at that point

            C.        junction in the channel

            D.        obstruction that must be left to port

 

43.       A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw.  Which signal

            indicates that the draw will not be open immediately.

            A.         a flashing amber light

            B.         a fixed red light

            C.         a white flag raised and lowered vertically

            D.        a flashing white light

 

44.       A white diamond daymark with an orange border is a(n)

            A.         special mark

            B.         information or regulatory mark

            C.         lateral aid on the intracoastal waterway

            D.        safe water mark

 

45.       Which light characteristic can be used on a special purpose mark

            A.        Fixed

            B.         occulting

            C.         equal intervals

            D.        quick flashing

 

46.       Buoys are marked with reflective material to assist in their detection by searchlight.

            Which statement is TRUE?

            A.         A safe water buoy will display red and white vertical stripes or reflective material

            B.         All reflective material is white because it is most visible at night

            C.         A special purpose mark will display either red or green reflective material to agree with its shape

            D.        A preferred channel buoy displays either red or green reflective material to agree with the top

                        band of color

 

47.       Duplicate of #34

 

 

 

 

 

48.       Under the U.S. Aids to Navigation System, a yellow buoy may

            A.        mark a fishing net area

            B.         be lighted with a white light

            C.         show a fixed red light

            D.        all of the above 

 

49.       Which symbol in illustration D015NG would indicate a large automated navigational buoy, such as those

            that have replaced some lightship?

            A.         A

            B.         B

            C.         C

            D.        D

 

50.       The normal range of a light may be accurately defined as the maximum distance at which a light may be

            seen.

            A.         Under existing visibility conditions

            B.         Under perfect visibility

            C.        Within ten miles visibility

            D.        With fifteen miles visibility

 

51.       Some lights used as aids to marine navigation have a red sector to indicate a danger area.  How are the

            limits of a colored sector of light listed in the Light List?

            A.         Geographical positions outlining the area of the sector

            B.         True bearings as observed from the light towards a vessel

            C.        True bearings as observed from a vessel towards the light

            D.        Bearings given in the Light List are always magnetic

 

52.       Under the U.S. Aids to Navigation System spherical buoys may be

            A.         numbered

            B.         lettered

            C.         lighted

            D.        all of the above

 

53.       A special purpose buoy

            A.         must be lighted

            B.         may have a flashing red light

            C.         may have a fixed white light

            D.        may have a fixed yellow light

 

54.       Which agency maintains federal aids to navigation?

            A.         Corps of Engineers

            B.         Coast Guard

            C.         National Ocean Service

            D.        Maritime Administration

 

55.       Preferred channel buoys indicate the preferred channel to transit by

            A.         odd or even numbers

            B.         the color of their top bands

            C.         the location of the buoy in the channel junction

            D.        the characteristic of the buoys light

 

56.       A safe water mark may be

            A.         vertically striped

            B.         spherical

            C.         showing a white light

            D.        all of the above

 

57.       A vessel’s position should be plotted using bearings of

            A.         buoys close at hand

            B.         fixed known objects on shore

            C.         buoys at a distance

            D.        all of the above

 

58.       Which symbol represents a twenty-fathom curve?

            A.        _.._.._.._..

            B.         -- -- -- -- --

            C.         .--.--.--.

            D.        ---------

 

59.       The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as

            A.         gains are made over the single path

            B.         a result of variation and propagation conditions

            C.         the frequency of the pulses increases

            D.        the stations shift pulses

 

60.       What agencies of the U.S. government issues charts of U.S. waters and coast pilots?

            A.        National Ocean Services

            B.         Defense Mapping Agency

            C.         U.S. Coast Guard

            D.        U.S. Naval Observatory

 

61        Most modern Loran-C receivers automatically detect station blink which

            A.         indicates the station is transmitting normally

            B.         automatically shuts down the receiver

            C.        triggers alarm indicators to warn the operator

            D.        causes the receiver to shift automatically to another Loran chain

 

62        Which would influence a magnetic compass?

            A.         Electrical wiring

            B.         Iron pipe

            C.         Radio

            D.        All of the above

 

63        A vessel position should be plotted using bearings of

            A.         buoys close at hand

            B.         fixed known objects on shore

            C.         buoys at a distance

            D.        All of the above

 

 

 

 

64        Loran-C receivers automatically detect station blink which

            A.         indicates the station is transmitting normally

            B.         automatically shuts down the receiver

            C.        indicates unreliability of the navigational information

            D.        causes the receiver to shift automatically to another Loran chain

 

65        On charts of U.S. waters, a magenta marking is NOT used for marking a

            A.        5-fathom curve

            B.         prohibited area

            C.         lighted buoy

            D.        radiobeacon

 

66        The annual change in variation for an aera can be found in

            A.         the handbook for Magnetic Compass Adjustment, Pub 226

            B.         the center of the compass rose on a chart of the area

            C.         the compass deviation table

            D.        variation dose not change

 

67        The lubber’s line on a magnetic compass indicates

            A.         compass north

            B.         the direction of the vessel’s heading

            C.         magnetic north

            D.        a relative bearing taken with an azimuth circle

 

68        Information for updating nautical charts is primarily found in the

            A.        Notice to Mariners

            B.         Coast Pilots

            C.         nautical chart catalogs

            D.        Sailing Directions

 

69        In the Loran-C configuration shown in illustration D003NG, the stations located at X Y, and Z are called

            A.         repeater stations

            B.         secondary stations

            C.         composite stations

            D.        alternate stations

 

70        What publication has information on the climate, distances, navigation regulations, outstanding         landmarks, channel and anchorages of Long Island Sound?

            A.         Light List

            B.         Coast Pilot

            C.         Sailing Directions

            D.        Pilot Chart

 

71        Variation is the angular measurement between

            A.         compass north and magnetic north

            B.         compass north and true north

            C.        Magnetic meridian and the geographic

            D.        your vessel’s heading and magnetic meridian

 

 

72        A compass card without north seeking capability that is used for relative bearings is a(n)

            A.         bearing circle

            B.         pelonus

            C.         bearing bar

            D.        alidade

 

73        Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?

            A.         Salinity of water

            B.         Temperature of water

            C.         Atmospheric pressure

            D.        Type of bottom

 

74        The lubber line of a magnetic compass

            A.         always shows true north direction

            B.         indicates the vessel’s heading

            C.         is always parallel to the vessel’s transom

            D.        is located on the compass card

 

75        Magnetic information on a chart may be

            A.         found in the center(s) of the compass rose(s)

            B.         indicated by isogonic lines

            C.         found in a note on the chart

            D.        All of the above

 

76        In which source could you find the number of a chart for a certain geographic area?

            A.         Chart No. 1

            B.         Catalog of Nautical Charts

            C.         American Practical Navigator

            D.        U.S. Coast Guard Light List

 

77        Blinking of a Loran-C signal indicates

            A.         the signal is in proper sequence

            B.         there will be no increase or decrease in kHz

            C.        there is an error in the transmission of that signal

            D.        that it has the proper GRI

 

78        The scale on a chart is given as 1:5,000,000.  This means that

            A.         1 inch is equal to 5,000 inches on the Earth’s surface

            B.         1 nautical mile on the chart is equal to 5,000 inches on the Earth’s surface

            C.        1 inch is equal to 5,000,000 inches on the Earth’s surface

            D.        1 nautical mile on the chart is equal to 5,000,000 inches on the Earth’s surface

 

79        Which aid is NOT marked on a chart with a magenta circle?

            A.         Radar station

            B.         Aero light

            C.         Radiobeacon

            D.        Radar transponder beacon

 

 

 

 

80        What should you apply to a fathometer reading to determine the depth of water?

            A.         Subtract the draft of the vessel.

            B.         Add the draft of the vessel.

            C.         Subtract the seawater correction

            D.        Add the seawater correction

 

81        Loran-C is which type of system?

            A.         Reflected electron

            B.         Electrical radiation

            C.         Quarterpoint electrical navigation

            D.        Hyperbolic radio navigation

 

82        The difference between magnetic heading and compass heading is called

            A.         Variation

            B.         Deviation

            C.         Compass error

            D.        Drift

 

83        The error in a magnetic compass caused by the vessel’s magnetism is called

            A.         Variation

            B.         Deviation

            C.         Compass error

            D.        Bearing error

 

84        The annual change in variation for an area can be found in

            A.         The handbook for magnetic compass adjustment

            B.         The center of a compass rose on a chart of the area

            C.         The compass deviation table

            D.        Variation does not change

 

85        DMAHTC charts are adopting the metric system.  In order to change a charted depth in meters to feet you

            should use the conversion table found

            A.         In the Light List

            B.         In Bowditch Vol II

            C.         On the chart

            D.        All of the above

 

86        What agency of the U.S. Government issues charts of the U.S. waters and Coast Pilots?

            A.        National Ocean Service

            B.         Defense Mapping Agency

            C.         U.S. Coast Guard

            D.        U.S. Naval Observatory

 

87        Lines of Position may be

            A.         Hyperboles

            B.         Straight lines

            C.         Arcs

            D.        All of the above

 

 

 

88        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

 

89        A line of position may be

            A.         Hyperboles

            B.         Arcs

            C.         Straight lines

            D.        Any of the above