Earth Magnetic Fields
Compass
Earth Magnetic and Magnetosphere
North Magnetic pole -The North Magnetic Pole is the point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downwards
Geographic North Pole - The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
Geographic South Pole-The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface.
South Magnetic Pole- The South Magnetic Pole is the wandering point on the Earth's Southern Hemisphere where the geomagnetic field lines are directed vertically upwards.
Diagram of a comass
Index Line- fixed within the outer edge of the compass housing as an extension of the direction of travel arrow. It marks the bearing you set by rotating the compass housing.
Orienting Arrow- series of parallel lines marked on the floor of the housing and on the base plate
Travel Arrow- marked on the base plate. You point this the way you will be traveling
Magnetic Needle- magnetized piece of metal that has one end painted red to indicate North. It sits on a fine point that is nearly friction less so it rotates freely when the compass is held fairly level and steady
orienting Line-series of parallel lines marked on the floor of the housing and on the base plate
Degree Dial- ring around the housing that has degree markings engraved. You hold the dial and rotate it to rotate the entire housing
How To Use A Compass
- Identify your position and your objective on the map. ...
- Align the edge of your compass with that line.
- Rotate the bezel so its orienting lines run parallel with the map's orienting lines (which point to true north).
- Than you put it in looking range
- than start walking and till you get the right place.