MAGNETISM AND COMPASS

Where on Earth is a magnetic compass most effective?

• AAt the geographic equator.
• BClose to the magnetic North Pole.
• CApproximately midway between the magnetic poles.

An aircraft in the northern hemisphere is making a precise rate one turn to the right; if the initial heading was 135°, what should the direct reading magnetic compass indicate after 30 seconds?

• A225°.
• BLess than 225°.
• CMore than 225°.

What is the term for a line that represents equal magnetic variation?

• AAn isoclinic.
• BAn isogonal.
• CAn isogriv.