Magnetism/compass

Question 1

Where does terrestrial magnetic field emerge from?

Answer 1

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

Question 2

Where is dip angle measured?

Answer 2

Between total field and local horizon

Question 3

What does large and low dip indicate?

Answer 3

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

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

Question 4

How is magnetic direction measured?

Answer 4

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

Question 5

What is the acceleration error aid?

Answer 5

NANDS

northern hemisphere: accelerating north and decelerating south

Question 6

What is the turning error aid?

Answer 6

NUNOS

North hemisphere: undershoot north and overshoot south

Question 7

What is a rate one turn?

Answer 7

3 degrees per second

Question 8

What causes a/c magnetism?

Answer 8

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

Hard iron components (permanent)

Electromagnetic components (only when current flows)

Question 9

What is deviation caused by?

Answer 9

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

Question 10

What are the component of the remote reading compass?

Answer 10

Flux detection unit (valve)

Gyro unit

Transducer

Precession amplifier