Construction of a magnetic compass Magnetic needle A magnetic rod is required when constructing a compass.

Using a magnetic compass A magnetic compass points to magnetic north pole, which is approximately 1,000 miles from the true geographic North Pole.

A compass deviation card is prepared so that the navigator can convert between compass and magnetic headings.

Bearing compass A bearing compass is a magnetic compass mounted in such a way that it allows the taking of bearings of objects by aligning them with the lubber line of the bearing compass.

A similar process is used to calibrate the compass in light general aviation aircraft, with the compass deviation card often mounted permanently just above or below the magnetic compass on the instrument panel.

The typical Chinese navigational compass was in the form of a magnetic needle floating in a bowl of water.

Deviation refers to the response of the compass to local magnetic fields caused by the presence of iron and electric currents one can partly compensate for these by careful location of the compass and the placement of compensating magnets under the compass itself.

Compass correction Like any magnetic device, compasses are affected by nearby ferrous materials, as well as by strong local electromagnetic forces.

Thus, the use of a magnetic compass by the military for land navigation occurred sometime before 1044, but incontestable evidence for the use of the compass as a maritime navigational device did not appear until 1117.

Compass

Compass

Compass

By carefully recording distances (time or paces) and magnetic bearings traveled, one can plot a course and return to one's starting point using the compass alone.

From these experiments, he concluded that the Earth was itself magnetic and that this was the reason compasses point north (previously, some believed that it was the pole star (Polaris) or a large magnetic island on the north pole that attracted the compass).

Compass Labels

Show compass

My compass.

Without a compass...

Good army compass.

As he was setting up his materials, he noticed a compass needle deflected from magnetic north when the electric current from the battery he was using was switched on and off.

Magnetic disk

Magnetic drum

Magnetic tape

Magnetic Moment

Magnetic Pole

My compass, it's gone!

Magnetic Stir Bar

Magnetic stir bar

Magnetic Outline Selection

Magnetic Outline Selection

living like a drawing compass.

You ever seen a compass?

Building orientation Evidence for the orientation of buildings by the means of a magnetic compass can be found in 12th century Denmark one fourth of its 570 Romanesque churches are rotated by 5 15 degrees clockwise from true east west, thus corresponding to the predominant magnetic declination of the time of their construction.

Magnetic Stir Bar Retriever

What are magnetic cores?

A lot of compass work here.

What worries me is the compass.

My life is run its compass.

It was innovation in Muslim communities that developed the order of algebra our magnetic compass and tools of navigation our mastery of pens and printing our understanding of how disease spreads and how it can be healed.

Magnetic Data Acquisition System project

Vostok Station, S Magnetic Pole

Refers to compass correction by Fourier series.

Color of cardinal compass labels along horizon

Submitted by Glenmore Compass (represented by counsel)

3 The Caymanian Compass, 26 September l99l.