Worksheetsseam 1
Total questions: 66
Worksheet time: 36mins
Which of the following mode of the echo sounder indicates the depth from the Keel of the ship down to the seabed?
A. DBS
B. DBK
C. DBT
D. UKC
If your ship’s draft is 8 meters and your echo sounder is set to DBK mode showing 10.5 meters, what is the total depth of the water?
A. 8 meters
B. 10.5 meters
C. 18.5 meters
D. 2.5 meters
Which of the following refers to the smallest water depth between the bottom of the ship and the seabed?
Under Keen Clearance
Ultimate Keel Clearance
Under Keel Center
Under Keel Clearance
Which of the following refers to the distance measured from the surface of the water down to the ship’s keel?
A. Draft
B. Air Draft
C. Freeboard
D. UKC
Calculating UKC requires detailed knowledge of the following, EXCEPT _________.
Depth through the waterways
RaDAR range
Tide Height per location
Squat
This happens when the bottom of the ship touches the seabed. The damage can be minor or it can lead to severe oil spill.
A. Beaching
B. Grounding
C. Collision
D. MOB
Which of the following refers to an electronic device used to determine the depth of the water by transmitting sound pulse into the water?
Rudder Indicator
Sound Receptor
Echo Sounder
Sounding Lead
Which of the following correctors will you adjust when compensating errors caused by the vertical component of the earth’s magnetic field?
Quadrantal sphere
Flinders bar
Heeling magnets
Athwartships magnets
Which chapter and annex of the SOLAS regulations indicates the carriage requirement of magnetic compass onboard ship?
A. Chapter V, Annex 10
B. Chapter V, Annex 11
C. Chapter V, Annex 12
D. Chapter V, Annex 13
Which part of the Nautical Chart can magnetic variation be found?
Chart number
Chart datum
Compass rose
Latitude scale
Which of the following refers to the shape of the earth?
Spherical
Oblate Spherical
Oblate Spheroid
Elongated Circle
Which of the following theory explains the earth’s magnetic field?
Darwin’s Theory
Magnetic Theory
Dynamo Theory
Newtons Law
Which of the following refers to a magnetism which remains after removal of the magnetizing force?
Induced magnetism
Permanent magnetism
Residual magnetism
Sub-permanent magnetism
Which of the following does NOT belong to the group?
Gimbals
Lubber line
Transducer
Expansion chamber
Which of the following is NOT true about the magnetic variation?
Exist to all parts of the globe
Difference between the true north and magnetic north
Identified in charts compass rose
Unique to each vessel
Magnetic deviation is unaffected by changes in a ship`s cargo or equipment.
True
False
A ship`s magnetic deviation is primarily caused by the magnetic influence of the ship`s own structure and equipment.
True
False
The Earth`s magnetic poles influence the level of deviation experienced by a ship.
True
False
The Earth`s magnetic field is uniform, leading to consistent compass readings worldwide.
True
False
A ship`s heading has no impact on the amount of deviation observed on the compass.
Regular calibration of a ship`s compass is necessary to account for changes in deviation over time.
True
False
Compass deviation can change when a ship travels between different latitudes.
True
False
The Earth`s magnetic field lines can be distorted by a ship`s movement, causing variation in the deviation.
True
False
Deviation and variation are interchangeable terms in marine navigation.
True
False
The deviation card provides information on how much a ship’s compass deviates from magnetic north based on its heading.
True
False
The magnetic compass onboard ship is located in the flying bridge/monkey island rather than inside the wheelhouse because:
it is less affected by magnetic interference from the ship's structure and equipment.
it is easier to access for the crew.
it is protected from weather conditions.
it is closer to the navigation charts.
If Magnetic North is 354°30’ on 2002 and the annual change of variation is 1°W, what is the variation of the locality for the year 2002?
354°30’ W
355°30’ W
353°30’ W
354°30’ E
Base from the given problem above, what will be the variation of the locality for the year 2020?
The variation of the locality for the year 2020 is 15%.
The variation of the locality for the year 2020 is 10%.
The variation of the locality for the year 2020 is 25%.
The variation of the locality for the year 2020 is 5%.
On year 2019, the magnetic variation of the locality was 4°15’W with an annual increment of 8’ decreasing. What is the magnetic variation for year 2023?
1°23’W
3°47’W
2°15’W
0°15’W
Base from the given deviation card, what is the value of deviation when the compass heading of the ship is 090°?
2°E
5°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 000°?
3½°E
2°W
1°E
0°
What is the deviation when the Ship’s Head by Compass is 010°?
4°E
2°W
0°
6°E
What is the deviation when the Ship’s Head by Compass is 020°?
4½°E
2°W
1°E
6°W
What is the deviation when the Ship’s Head by Compass is 030°?
5°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 040°?
5°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 050°?
5°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 060°?
5½°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 070°?
5½°E
2°W
1°E
7°W
What is the deviation when the Ship’s Head by Compass is 080°?
5°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 090°?
5°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 100°?
4½°E
2°W
1°E
6°W
What is the deviation when the Ship’s Head by Compass is 110°?
4°E
2°W
0°
6°E
What is the deviation when the Ship’s Head by Compass is 120°?
3½°E
2°W
1°E
4°W
What is the deviation when the Ship’s Head by Compass is 130°?
3°E
2°W
1°E
4°W
What is the deviation when the Ship’s Head by Compass is 140°?
2°E
1°W
3°E
0°
What is the deviation when the Ship’s Head by Compass is 150°?
1°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 160°?
½°W
1°E
2°W
0°
What is the deviation when the Ship’s Head by Compass is 170°?
1½°W
2°E
0°
3°W
What is the deviation when the Ship’s Head by Compass is 180°?
2½°W
1°E
0°
3°W
What is the deviation when the Ship’s Head by Compass is 190°?
4°W
2°E
1°W
3°E
What is the deviation when the Ship’s Head by Compass is 200°?
5°W
2°E
3°W
1°E
What is the deviation when the Ship’s Head by Compass is 210°?
5½°W
2°E
1°W
7°E
What is the deviation when the Ship’s Head by Compass is 220°?
6½°W
3°E
2°W
0°
What is the deviation when the Ship’s Head by Compass is 230°?
6½°W
2°E
4°W
1°E
What is the deviation when the Ship’s Head by Compass is 240°?
7°W
3°E
5°W
2°E
What is the deviation when the Ship’s Head by Compass is 250°?
6½°W
2°E
4°W
1°E
What is the deviation when the Ship’s Head by Compass is 260°?
6½°W
2°E
4°W
1°E
What is the deviation when the Ship’s Head by Compass is 270°?
5½°W
2°E
3°W
1°E
What is the deviation when the Ship’s Head by Compass is 280°?
4½°W
2°E
1°W
6°E
What is the deviation when the Ship’s Head by Compass is 290°?
3½°W
2°E
1°W
4°E
What is the deviation when the Ship’s Head by Compass is 300°?
2½°W
1°E
4°W
0°
What is the deviation when the Ship’s Head by Compass is 310°?
1½°W
2°E
0°
3°W
What is the deviation when the Ship’s Head by Compass is 320°?
½°W
1°E
2°W
0°
What is the deviation when the Ship’s Head by Compass is 330°?
½°E
1°W
2°E
0°
What is the deviation when the Ship’s Head by Compass is 340°?
1½°E
2°W
0°
3°E
What is the deviation when the Ship’s Head by Compass is 350°?
2½°E
1°W
0°
3°E
