Magnetism/compass Flashcards

1
Q

Where does terrestrial magnetic field emerge from?

A

Magnetic South Pole and re-enters earth at the magnetic North Pole

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2
Q

Where is dip angle measured?

A

Between total field and local horizon

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3
Q

What does large and low dip indicate?

A

LARGE = weak horizontal (H) field and strong vertical (Z)

LOW = strong horizontal (H) and low vertical (Z)

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4
Q

How is magnetic direction measured?

A

Relative to the local magnetic field horizontal direction (magnetic north)

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5
Q

What is the acceleration error aid?

A

NANDS

northern hemisphere: accelerating north and decelerating south

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6
Q

What is the turning error aid?

A

NUNOS

North hemisphere: undershoot north and overshoot south

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7
Q

What is a rate one turn?

A

3 degrees per second

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8
Q

What causes a/c magnetism?

A

Soft iron components (temporary, depending on attitude and location)

Hard iron components (permanent)

Electromagnetic components (only when current flows)

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9
Q

What is deviation caused by?

A

The interaction of the a/c magnetic field and the earths magnetic field

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10
Q

What are the component of the remote reading compass?

A

Flux detection unit (valve)

Gyro unit

Transducer

Precession amplifier

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