Magentism Flashcards
Where do the meridians meet
Geographic North Pole
Why does the earth behave like a magnet
Iron core
Where is the magnetic equator
Halfway between magnetic N and magnetic S
Where magnetic field lines = horizontal
What is the horizontal component of earths magnetic field
H
What is the vertical component of the earths magnetic field
Z
What component of the earths magnetic field drives a compass
The H component
Where is a compass most effective
Equator
What are isoclinal lines
Lines of equal dip
What is an aclinic line
Line of zero dip
What is magnetic variation
Angle between north and magnetic North Pole
If magnetic north pole is west of true North Pole what is the variation
West
What are isogonals
Lines of equal variation
Found on maps
What are agonic lines
Lines of 0 variation
What is the maximum magnetic variation
180°
What is the track on a chart
True track
What is residual deviation
Deviation left behind after the compass swing
Where do you find the compass deviation
Compass deviation card
What does a deviation of +3 mean
3° east
When are you required to do a compass swing
After a hard landing
As part of maintenance
Large changes in operational latitude
Stuck by lightning
If cargo is significantly magnetic
Aircraft parked in same direction for long period of time
New compass fitted
