Maritime Navigation Quiz

What should a mariner do to apply knowledge of variation and deviation when determining the ship's true heading?

• Adjust the compass course to find the true heading

• Align the compass with GPS data

• Prevent the ship from rolling and pitching

• Eliminate all compass errors permanently

How can deviation from permanent magnetism be reduced?

• Recalculate annual change of variation each year

• Place and adjust corrector magnets near the compass

• Record deviation without using compensation devices

• Use only a liquid-filled compass instead of a dry one

How should a mariner apply proper technique when reading a compass to ensure accurate heading?

• By reading at eye level to avoid parallax error

• By reducing deviation caused by the ship's tilt

• By canceling annual variation automatically

• By aligning the compass with Earth's equator

Which statement best defines the Earth's magnetic field and its influence on a magnetic compass?

• It's a static force from a solid core

• It's a static force from fixed poles

• It's a dynamic force from a liquid core

• It's a recent, man-made phenomenon

A magnetic compass is primarily designed to align with which of the following?

• The Earth's lines of longitude

• The celestial North Star

• The Earth's geomagnetic field lines

• The local gravitational field

How is Magnetic Variation best described?

• Compass mechanical error

• Angle between needle and keel

• Angle between True and Magnetic North

• Temporary solar storm error

How does the liquid inside a magnetic compass bowl help improve its performance during navigation?

• It increases the compass's buoyancy for floating stability

• It provides a clear medium for visual inspection

• It dampens the movement for smooth readings

• It lubricates the pivot to reduce friction

If two magnets with opposite poles are placed near each other, what principle explains the force they exert?

• Opposite poles repel, so they push away

• Opposite poles attract, so they pull toward each other

• Opposite poles have no effect on each other

• Opposite poles sometimes attract and sometimes repel depending on orientation

Why do opposite magnetic poles attract each other according to the principles of magnetism?

• Because they repel each other due to field resistance

• Because they have no measurable interaction

• Because their magnetic fields complement and pull together

• Because they sometimes attract and sometimes repel randomly

How is a magnetic compass's alignment with the Earth's poles best described?

• North pole aligns with true North Pole

• North pole aligns with magnetic South Pole

• North pole aligns with a fixed magnetic North Pole

• North pole aligns with a shifting magnetic North Pole