Magnetic Compass Flashcards
Where is the Magnetic North Pole right now?
Canada
How far does the Magnetic North Pole move each year?
40km
What is Variation?
The difference between the Magnetic North Pole and the True North Pole
Where will you find the Variation?
On the Compass Rose
If the Variation is East do you add or subtract from the True North Pole?
Add
If the Variation is West do you add or subtract from the True North Pole?
Subtract
How many minutes in one degree?
60
What is Deviation?
Stray magnetic fields in the vicinity like heavy metal from the engines can give inaccurate compass readings
What is it called when you check the compass and how often should this be done?
Swinging the compass and annually
True or False
Hand bearing compasses are treated as having zero variation
True
How often should you check for deviation?
Once a year
True or False
The original magnetic compass is the only compass not to require power
True
What is the Fluxgate Compass?
Two or more coils, small current detects the earth’s magnetic field
True or False
A magnetic compass is always carried as back up
True
