MANAGEMENT – DECK
REPUBLIC OF THE PHILIPPINES
DEPARTMENT OF TRANSPORTATION
MARITIME INDUSTRY AUTHORITY
STCW OFFICE
GUIDE QUESTIONNAIRES
for seafarers
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Maritime Administration Responsible for the Implementation and Enforcement of
the 1978 International Convention on Standards of Training, Certification and
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Covenants related thereto and its Implementing Rules and Regulations.
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of Examiners which may serve as a guide for the review of aspiring Marine Deck and
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Examination.
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given during the theoretical examination. Examinees are encouraged to study the
contained sample questions and probable answers as they are intended to give an
indication of the format and difficulty level of the theoretical examination.
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A Publication of the MARINA STCW Office
ML-Deck: COMPETENCE 3 - Determine and Allow for Compass Errors
No.
Questions
Choice A
Choice B
Choice C
Choice D
1
A magnetic compass card is marked in how many degrees?
90
180
360
400
A ship is heading 350deg. per gyro compass and 358.5deg. per
standard compass. The gyro error is 1.5deg. E and the variation is
6deg. W. Find the deviation.
1.0deg. W
2.0deg. E
1.0deg. E
2.0deg. W
2
A single vertical magnet placed underneath the compass in the
binnacle is used to compensate for:
the horizontal
deviation caused by
induced magnetism in induced magnetism in
component of the
the vessel's inclination the horizontal soft iron the vertical soft iron
permanent magnetism from the vertical
3
A true course of 041deg. between two waypoints is plotted on the 044deg. pgc
nautical chart. At that moment the wind is blowing from Eastsoutheast which would require you to make an allowance of 2 deg.
to compensate the effect of the wind. If your Gyro error is 1deg.W,
what gyro course should be steered to make the true course good?
043deg. pgc
042deg. pgc
040deg. pgc
5
A vessel heading ESE is on a course of:
112.5°
135.0°
157.5°
180.0°
6
A vessel heading SSE is on a course of:
112.5°
135.0°
157.5°
180.0°
7
A vessel heading WSW is on a course of:
202.5°
225.0°
247.5°
271.0°
As a vessel changes course to starboard, the compass card in a
magnetic compass:
remains aligned with
compass north
also turns to starboard first turns to starboard turns counterclockwise
then counterclockwise to port
to port
At the master gyrocompass, the compass card is attached to the:
spider element
sensitive element
link arm
pickup transformer
By convention, the Earth's south magnetic pole is colored:
blue
black
white
red
Compass deviation is caused by:
magnetism from the misalignment of the
earth's magnetic field compass
Deviation is caused by:
changes in the earth's nearby magnetic land magnetic influence
magnetic field
masses or mineral
inherent to that
deposits
particular vessel
4
8
9
10
11
12
magnetism within the a dirty compass
vessel
housing
the magnetic lines of
force not coinciding
with the lines of
longitude
Answer
Eight points of a compass are equal to how many degrees?
45
90
180
360
Gyrocompass repeaters reproduce the indications of the master
gyrocompass. They are:
accurate only in the
Polar regions
accurate electronic
servomechanisms
hand operated
accurate only if the
vessel is underway
How many points are there in a compass card?
4
8
24
32
16
If the compass heading and the magnetic heading are the same
then:
the deviation has been there is something
offset by the variation wrong with the
compass
the compass is being
influenced by nearby
metals
there is no deviation
on that heading
Indications of the master gyrocompass are sent to remote repeaters follow-up system
by the:
transmitter
phantom element
azimuth motor
17
"E" coefficient
"B" coefficient
"D" coefficient
"E" coefficient
18
It is a semi-circular deviation which is proportional to the cosine
twice of the compass heading.
Magnetic variation changes with a change in:
the vessel's heading
sea conditions
seasons
the vessel's position
Magnets in the binnacles of magnetic compasses are used to reduce deviation
the effect of:
variation
local attraction
All of the above
Parameter R is a ______________ component.
Fore-and-aft
Athwartship
Horizontal
13
14
15
19
20
Vertical
21
The chart indicates the variation was 3°45'E in 1988, and the annual 3°27'E
change is increasing 6'. If you use the chart in 1991 how much
variation should you apply?
3°27'W
3°45'E
4°03'E
22
The chart indicates the variation was 3deg. 48’ W in 1996 and the
annual change is 8’ W. If you use the chart in 2000, how much
variation should you apply?
3deg. 16’ W
4deg. 20’ W
4deg. 20’ E
3deg. 16’ E
23
The difference between the true north and the compass north is
called:
compass error
deviation
gyro error
variation
24
25
The Flinders bar and the quadrantal spheres should be tested for
permanent magnetism at what interval?
They are not subject to Semiannually
permanent
magnetism; no check
is
necessary.
I and
III
I and II
Annually
Every five years
I only
II only
4.5 meters
6 meters
2.5 meters
27
The following are magnetic compass correctors, which CANNOT be
set on a heading of magnetic north or magnetic south? I. Fore and
aft magnets and Flinders bar II. Heeling magnets and Athwartship
magnets III. Quadrantal spheres
The height of the masthead light of a vessel which is 12 meters but 2 meters
less than 20 meters in length above the gunwale?
The line connecting the points of the earth's surface where there is
no dip is the:
agonic line
magnetic equator
isodynamic
isopor
28
The MOST important feature of the material used for making the
binnacle of a standard magnetic compass is that it is:
nonmagnetic
weatherproof
corrosion resistant
29
capable of being
permanently affixed to
the vessel
30
The purpose of the soft iron spheres mounted on arms on the
binnacle is to compensate for:
31
The vertical angle between the horizontal and the magnetic line of
force is the:
the vertical
the residual deviation
component of the
permanent magnetism
of
the vessel
elevation
magnetic angle
26
Variation in a compass is caused by:
32
worn gears in the
compass housing
magnetic fields caused induced magnetism in
by electrical currents the horizontal soft iron
in the vicinity
vertical angle
dip
magnetism from the magnetism within the lack of oil in the
earth's magnetic field vessel
compass bearings
What coefficient is proportional to the sine of the compass heading? "B" Coefficient
"D" Coefficient
"C" Coefficient
"A" Coefficient
What do you call the coefficient which is semi-circular deviation
and is proportional to the sine of the compass heading?
Coefficient B
Coefficient A
Coefficient C
Coefficient D
What is the deviation that changes sign approximately each 90
degrees change of heading caused by induced magnetism in the
horizontal soft iron?
Quadrantal deviation
Residual deviation
Constant deviation
Semi-circular deviation
35
36
What is the relative bearing of an object broad on the starboard
quarter?
045°
090°
135°
225°
33
34
37
38
39
40
41
42
When changing from a compass course to a true course you should variation
apply:
deviation
variation and deviation a correction for the
direction of current set
Which of the following magnetic compass corrector(s) CAN be set
while the vessel is on heading of magnetic northeast or magnetic
southeast? I. Fore and aft magnets and Flinders bar II. Heeling
magnets and Athwartship magnets III. Quadrantal spheres
I and II
II only
I only
Which statement about the Flinders bar of the magnetic compass is It compensates for the It compensates for
CORRECT?
error caused by the
error caused by the
vertical component of heeling of a vessel.
the Earth's magnetic
field.
It compensates for
quadrantal deviation.
It is only needed in
equatorial waters.
While proceeding up a channel on a course of 010deg. per gyro
2deg. East
compass you notice a pair of range lights in alignment with the
masts of your vessel when viewed forward. A check on the chart
shows the range to be 009deg. T and the variation on the compass
rose to be 15deg. W. If the ship's course is 026deg. psc, what is the
deviation on the present heading?
2deg. West
1deg. West
1deg. East
You observed the rising sun bearing 087deg. PGC. If the latitude of
the place is 15deg. 20’ N, What is the declination?
2deg. 53’ 35” S
15deg. 18’ 42.5” S
15deg. 18’ 42.5” N
2deg. 53’ 35” N
Your ship is heading magnetic north and its magnetic compass
indicates a heading of 008˚. What action should be taken during
compass adjustment to remove this error?
Raise or lower the
Move the quadrantal
athwartships magnets spheres out
Move the quadrantal
spheres closer to the
compass
Remove some of the
Flinders bar
III only