Transcript 40507 - 2137 Calgary Highlanders Cadet Corps

HOW A COMPASS WORKS
•
Magnetic Needle – Permanently magnetized needle is placed on
a pivot and rotates freely in the horizontal plane.
•
Earth’s Magnetic Field – Exerts forces on the compass needle,
causing it to rotate until it comes to rest the the same direction
as the magnetic field.
•
Magnetic Pole – The north magnetic pole is located about
1000Km from the geographical north pole.
•
Horizontal Force – Responsible for the direction in which the
compass needle is oriented.
•
Shift – The magnetic field allows the magnetic north pole to
shift geographic position about 5-10cm per year.
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The Parts of the Compass
Sight
Sighting Line
Sighting Mirror
Magnetic Needle
Orienting Arrow
Screwdriver
Luminous Point
Adjustable Wrist Lock
Safety Cord
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Care and Maintenance of the
Compass
• Treat your compass
with respect!
• Avoid extremes of
temperature
• Try not to drop or
bang your compass use the safety cord!
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