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MANAGEMENT – DECK
REPUBLIC OF THE PHILIPPINES
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GUIDE QUESTIONNAIRES
for seafarers
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given during the theoretical examination. Examinees are encouraged to study the
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A Publication of the MARINA STCW Office
ML-Deck: COMPETENCE 2 - Determine Position and the Accuracy of
Resultant Fix by any means
No.
Questions
Choice A
Choice B
Choice C
Choice D
A celestial body will cross the prime vertical circle when the latitude greater than the
less than the
greater than the
is numerically:
declination and both declination and both declination and both
are of the same name are of the same name are of contrary name
less than the
declination and both
are of contrary name
What is a chart with a scale of 1:45,000?
harbor chart
coast chart
A Doppler log in the bottom return mode indicates the:
velocity of the current bottom characteristics depth of the water
speed over the ground
4
A great circle crosses the equator at 134°E. It will also cross the
equator at what other longitude?
46°W
124°W
134°W
34°E
5
A great circle crosses the equator at 93°W. It will also cross the
equator at what other longitude?
13°E
87°E
177°E
177°W
A latitude line will be obtained by observing a body:
on the prime vertical
at lower transit
What is a line on the Earth which is parallel to the equator called?
gnomonic curve
on the celestial
horizon
small circle
meridian
on the Greenwich
meridian
great circle
What kind of projection is a Mercator chart?
cylindrical projection
simple conic
projection
polyconic projection
rectangular projection
A navigator is at the Antarctic Circle and a body is at the Autumnal North
Equinox, what will be the bearing of the body during upper transit?
5deg. south
15deg. North
South
A pilot chart does NOT contain information about:
average wind
conditions
tidal currents
magnetic variation
average limits of field
ice
11
A position on the Earth has a longitude of 74°10'E. Its celestial
counterpart would have a:
GHA of 285°50'
SHA of 74°10'
SHA of 285°50'
LHA of 74°10'E
A ship is in longitude 54°00'W on a true course of 270°. The ship's
clocks are on the proper time zone. At what longitude should the
clocks be changed to maintain the proper zone time?
45°00'W
52°30'W
60°00'W
67°30'W
12
5.1 miles
4.2 miles
4.9 miles
13
A ship is proceeding on a course of 246deg.(T) at a speed of 17
4.6 miles
knots. At 2107H a lighthouse was observed bearing 207deg.(T) and
at 2119H the same lighthouse bears 179deg.(T). What's her
distance off at second bearing?
1
2
3
6
7
8
9
10
sailing chart
general chart
14
15
A vessel in initial position 60deg. 00; 04deg. 00' E steam due west
for 240 miles. Calculate the new longitude to the nearest minute.
8deg. 00' W
A vessel is steaming in east longitude on January 25 and crosses the 0900, 24 January
International Date Line on an eastbound course at 0900 zone time.
What is the date and time at Greenwich when the vessel crosses the
line?
2deg. 00' E
12deg. 00' W
4deg. 00' W
2100, 24 January
2100, 25 January
0900, 26 January
What is an alternating light?
shows a light with
shows a light that
varying lengths of the changes color
lighted period
marks an alternate
lesser-used channel
is used as a
replacement for
another light
17
The last stars at evening stars that should be observed are those
with an azimuth in what quadrant?
Southern
Western
Northern
Eastern
18
At Lat. 55deg. 53’ N; Long 130deg. 18’ W, sun’s declination is 12deg. 067deg. T
40’ N. Find True Azimuth (Zn) at sunset?
293deg. T
247deg. T
067deg.
Automatic identification systems (AIS) are required to:
receive safety-related
information
automatically from
similarly equipped
vessels
10h 32m 10s
exchange safetyrelated information
with shore-based
facilities
All of the above
10h 31m 08s
10h 12m 15s
16
19
20
Calculate the ZT of moonset on Sept. 20 at lat 60deg. 20’ N long
147deg. 28’ E when the corrected LMT of moonset is 1021H.
Diurnal aberration is due to which of the following?
provide safety-related
information
automatically to shore
stations, other vessels
and aircraft
10h 10m 52s
motion of the Earth in rotation of the Earth
its orbit
on its axis
21
the body's orbital
a false horizon
motion during the
time required for its
light to reach the Earth
35deg. 49.2' N
34deg. 17.6' N
36deg. 13.4' N
22
Determine the latitude of the observer if the true altitude of Polaris 35deg. 13.4' N
is 34deg. 17.6'. The correction values from the Polaris Tables: Ao =
0deg. 58.5', A1 = 0.6', A2 = 0.9'
General information about the location, characteristics, facilities,
World Port Index
and services for U.S. and foreign ports may be obtained from which
publication?
Sailing Directions
Distances Between
Ports
Coast Pilot
23
If an observer is at 35°N latitude, his zenith is:
55°S of the celestial
equator
at the north celestial
pole
35°N of the celestial
equator
55°N of the celestial
equator
Determine the longitude if the GHA of the sun is 173 degrees and
LHA is 358 degrees.
5deg. W
175deg. E
5deg. E
175deg. W
24
25
If the observer is at 10deg. North, and the sun is at summer solstice, 23deg. 27' S
what will be the bearing of the body during meridian passage?
000deg. T
180deg. T
23deg. 27' N
26
27
If the observer is at Tropic of Cancer, and the sun is at Vernal
Equinox, at meridian passage, the sun will bear:
S'ly
West
East
N'ly
62°48'
27°12'
152°48'
43°12'
sunrise
1200 LMT
sunset
2400 LMT
28
29
If the Sun's observed altitude is 27°12', the zenith distance is:
In low latitudes, a last quarter moon will always rise at about what
time of the day?
In order to remove side error from a sextant, you should adjust the: horizon glass to make
it parallel to the
horizon mirror with
the index set at zero
horizon glass to make horizon glass to make telescope to make it
it perpendicular to the it perpendicular to the parallel to the sextant
index mirror with the sextant frame
frame
index set at zero
31
In the celestial equator system of coordinates, what is comparable
to LATITUDE on the terrestrial sphere?
Declination
Altitude
Celestial meridians
Right ascension
32
In the equinoctial system of coordinates, what is comparable to
EQUATOR on the terrestrial sphere?
Celestial Equator
Hour Circles
Celestial meridians
Hour Angles
33
In the horizon system of coordinates what is equivalent to latitude
on the Earth?
Altitude
Zenith
Declination
Zenith distance
34
In the horizon system of coordinates what is equivalent to the
meridian angle of the celestial equator system?
Azimuth angle
Zenith distance
Co-latitude
Altitude
In very high latitudes, what is the most practical chart projection?
Mercator
gnomonic
azimuthal
Lambert conformal
In what latitude will a departure of 200 nautical miles corresponds 41deg. 24.6' N or S
to a Dlo of 4 degrees 16'?
Information about currents around Pacific Coast ports of the U.S. is Nautical Almanac
found in the:
Isogonic lines are lines on a chart indicating:
points of equal
variation
12deg. 54.6'
38deg. 37.5' N or S
51deg. 19.1' Nor S
Tide Tables
Tidal Current Tables
Ocean Current Tables
points of zero
variation
the magnetic latitude
magnetic dip
Local sidereal time is equal to the:
GHA of Aries minus
180°
SHA of Aries
LHA of Aries
right ascension of
Aries plus 180°
On a Mercator chart, 1 nautical mile is equal to:
1 minute of longitude 1 degree of longitude
1 minute of latitude
1 degree of latitude
Planetary aberration is due, in part, to:
refraction of light as it rotation of the Earth
enters the Earth's
on it's axis
atmosphere
the body's orbital
motion during the
time required for its
light to reach Earth
a false horizon
30
35
36
37
38
39
40
41
42
What does the solid green arrows on the main body of a pilot chart prevailing wind
indicate?
directions
prevailing ocean
current directions
probable surface
current flow
shortest great circle
routes
The accuracy of an azimuth circle can be checked by:
aligning the relative
bearing markings so
that 000° is on the
lubber's line and the
line of sight passes
over the center of the
compass
ensuring that the
alignment marks on
the inner face of the
circle are in line with
those on the repeater
on relative bearings of
000° and 090°
local sidereal time
sidereal hour angle
comparing observed
azimuths at different
altitudes with
computed values at
the times of
observation to see if
the difference is
constant
azimuth angle
sidereal hour angle
meridian angle
43
sighting a terrestrial
range in line and
comparing the
observed bearing
against the charted
bearing
44
The angle that is measured westward from the first point of Aries to Greenwich sidereal
the hour circle of the body along the celestial equator is the:
angle
45
The celestial coordinate of a star that is relatively constant in value
is the:
The chart of a beach area shows a very steep slope to the
Surging
underwater beach bottom. Which type of breakers can be expected
when trying to land a boat on this beach?
Converging
Spilling
Plunging
46
The date is the same all over the world at:
1200 GMT
0000 LMT for an
observer at 90°E
longitude
increases with
increased latitude
no time
Greenwich hour angle local hour angle
0000 GMT
47
48
The distance between any two meridians measured along a parallel increases in north
decreases as DLO
of latitude:
latitude and decreases increases
in south latitude
decreases with
increased latitude
The dividing meridian between zone descriptions +4 and +5 is:
67°30'W
90°00'W
67°30'E
75°00'E
The equation of time is 12m 00s and the mean Sun is ahead of the
apparent Sun. If you are on the central meridian of your time zone,
at what zone time will the apparent Sun cross the meridian?
1148
1200
1212
It cannot be
determined from the
information given.
The equation of time is 8m 00s. The mean sun is ahead of the
apparent sun. If you are 2deg. W of the central meridian of your
time zone, when will the apparent sun cross your meridian?
1152
1220
cannot be determine
1216
The first point of Aries is the point where the Sun is at:
maximum declination maximum declination 0° declination going to 0° declination going to
north
south
northerly declinations southerly declinations
The geographical position (GP) of a body for a high altitude sight is
determined from the Greenwich hour angle and which of the
following?
circle of equal altitude zenith distance
azimuth angle
declination
53
54
The index error is determined by adjusting the:
sextant frame
index mirror
micrometer drum
49
50
51
52
horizon glass
55
The LMT of LAN is 1210. Your longitude is 70°30'E. Which time
would you use to enter the Nautical Almanac to determine the
declination of the Sun at LAN?
1842
The lunar or tidal day is:
about 50 minutes
about 50 minutes
shorter than the solar longer than the solar
day
day
56
57
1652
The maximum difference between mean time and apparent time is: equal to the longitude about 16 minutes
expressed in time units
0652
about 10 minutes
longer than the solar
day
the same length as the
solar day
the difference
15° of arc
between the GHA of
mean sun and the first
point of Aries
At lunar solstice
At quadrature
58
When is the Moon farthest from the Earth?
At full Moon
59
Why is the new Moon cannot be seen by an observer from the
earth's surface?
Because the Moon is in Because the Moon is
the opposite direction below the horizon
of the Sun
Because the Moon is Because the Moon is
between the Earth and at quadrature
the Sun
60
The parallel of latitude at 23°27'S is the:
Tropic of Cancer
Tropic of Capricorn
Arctic Circle
ecliptic
The paths of intended travel between three or more points is the:
course
track
bearing
course over the
ground
The point on the celestial sphere that is directly below an observer
is the:
pole
nadir
node
zenith
The primary use of apparent time in marine navigation is to:
calculate sunrise or
sunset
determine zone time
enter an almanac
determine the time of
meridian transit
The radius of a circle of equal altitude of a body is equal to the:
co-altitude of the body altitude of the body
co-declination of the
body
polar distance
61
62
63
64
At apogee
0728
65
The Sailing Directions (Planning Guide) contain information on all of coastal features
the following EXCEPT:
ocean basin
environment
ocean routes
military operating
areas
66
The short text messaging feature of the automatic identification
system (AIS) allows for messages of up to:
56 characters
64 characters
128 characters
158 characters
67
The standard time meridian for description +12 is:
172.5°E
180.0°
172.5°W
165.0°W
it crosses the
December solstitial
point
it crosses the June
solstitial point
it is in upper transit
its declination is zero
68
The Sun's center may be coincident with both the celestial equator
and the observer's prime vertical circle when:
69
The values of the Greenwich hour angle and declination, tabulated
in all almanacs, are for the:
upper limb of a
celestial body
lower limb of a
celestial body
centers of the various lower limb of the Sun
celestial bodies
and Moon; center of
the stars and planets
There are seven sources of error in the marine sextant. Of the four
errors listed, which one is adjustable?
Error of collimation
Prismatic error
Graduation error
70
Centering error
71
72
To an observer in longitude 172 degrees E, the LHA of a star is 315
degrees. If the SHA of the star is 036 degrees, what is the GHA of
Aries?
143deg.
091deg.
127deg.
107deg.
What area of the earth cannot be shown on a standard Mercator
chart?
Equator
Areas including both
North and South
latitudes
Estimated position
North and South Poles A narrow band along
the central meridian
Fix
Running fix
73
What describes an accurate position that is NOT based on any prior Dead-reckoning
position?
position
74
What is a non-adjustable error of the sextant?
Prismatic error
Index error
Side error
Error of collimation
75
What is the length of a nautical mile?
1,800 meters
2,000 yards
6,076 feet
5,280 feet
76
What is the primary source of the earth's weather?
The oceans
The moon
The sun
The solar system
77
What should you apply to a fathometer reading to determine the
depth of water?
Subtract the draft of
the vessel.
Add the draft of the
vessel.
Subtract the sea water Add the sea water
correction.
correction.
When daylight savings time is kept the times of tide and current
calculations must be adjusted. One way of doing this is to:
subtract one hour
from the times listed
under the reference
stations
add one hour to the
apply no correction, as
times listed under the the times in the
reference stations
reference stations are
adjusted for daylight
savings time
add 15° to the
standard meridian
when calculating the
time difference
When taking an amplitude, the Sun's center should be observed on
the visible horizon when:
in high latitudes
the Sun is near or at a the declination is of a
solstice
different name from
the latitude
the meridian through the meridian midway
the ship's position
between the ship and
the object
mean low water
mean lower low water
the Sun's declination is
at or near 0°
78
79
81
When using a Lambert conformal chart in high latitudes, angles such the meridian through
as bearings are measured in reference to:
the object of the
bearing
When utilizing a Pacific Coast chart, the reference plane of
mean low water
soundings is:
springs
82
Where would you find information concerning the duration of slack Tide Tables
water?
Tidal Current Tables
American Practical
Navigator
Sailing Directions
Selective Availability
Auto-correlation
Anti-spoofing
84
Which feature, when set to zero, might allow a GPS unit to have an Transit
accuracy equivalent to Precise Positioning Service receiver
capability?
Which is an inferior planet?
Mars
Venus
Neptune
Pluto
85
Which publication contains information on Naval Control of
Shipping (NCS) in time of emergency or war?
Appropriate volume of Pub. 102, International Light List
the Sailing Directions Code of Signals
86
Which publication would NOT be used on a voyage from Houston to Coast Pilot
New York?
80
83
Pub. 117, Radio
Navigational Aids
Light List
Radio Navigational
Aids
any meridian
lowest normal low
water
Sailing Directions
(Enroute)
87
88
89
90
91
Which table is NOT found in the U.S. Coast Pilots?
Climatological table
Luminous range table Meteorological table
Coastwise distance
table
Why are low altitude sun sights not generally used?
Errors due to unusual
refraction may exist
Sextants may have
large errors at small
angles of elevation
Modern sight
reduction tables are
not complete for low
altitudes below 5°
The glare on the
horizon causes
irradiation errors
You are planning a voyage from New York to Norway via the English Channel Pilot's Guide
Channel. Which publication contains information on the dangers to
navigation in the English Channel?
World Port Index
Coast Pilot
Sailing Directions
(Enroute)
You are steering 115deg. T, and a light was picked up dead ahead at 0544H
a distance of 16.7 miles at 0522. You change course to pass the
light 3.5 miles off abeam to port. If you are making 12 knots, what
is your ETA at the position 3.5 miles off the light?
0547H
0531H
0644H
A vessel is to proceed at 12 knots on a course of 211deg. T through CTS = 203deg.T; SOA CTS = 199deg.T; SOA CTS = 205deg.T; SOA CTS = 203deg.T; SOA
a current estimated to be setting at 255deg. T and a drift of 3 knots. = 11 knots
= 10 knots
= 13 knots
= 11 knots
Find Course To Steer (CTS) and the speed of advance (SOA).