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
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
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
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
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
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
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.
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
A.
B.
Defense Mapping Agency
C.
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
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
A.
B.
Defense Mapping Agency
C.
D.
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
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
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
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
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
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.
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
A.
B.
Defense Mapping Agency
C.
D.
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
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.
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
A.
B.
Defense Mapping Agency
C.
D.
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