What do you know about it?
The compass is an instrument used for navigation; it generally has a magnetic needle that points toward the earth's magnetic North Pole.
Did you know?
The magnetic compass was first invented in China by Chinese Han Dynasty between the 2nd century BC.The first compass were made of lodestone, a naturally magnetized ore of iron. The compass was used in Song Dynasty China by the military for navigational orienteering and it was used for maritime navigation. Ancient Chinese people found that if a lodestone was suspended so it could turn freely, it would always point in the same direction, toward the magnetic poles. The use of a compass is recorded in Western Europe between 1187 and 1202.This was supplanted in the 20th century by the liquid-filled magnetic compass. The dry compass was invented in Europe around 1300.
Types of compasses:
Magnetic Compass:-This is most simple and common type of compass, are aligned to the earth's magnetic field. These compasses point to the earth's magnetic North Pole.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.
How does it works?
This compass functions as a pointer to "magnetic north" because the magnetized needle at its heart aligns itself with the lines of the Earth's magnetic field.
Military Compass:-This was used in first world war.Mr Bamber bought the compass in 1965 from an antique shop in Blackpool.This enabled mariners to navigate safely far from land, increasing sea trade, and contributing to the Age of Discovery.
How does it works?
This Compass needle's "north" pole is defined as the one which is attracted to the North. The compass needle's north pole is always marked in some way: with a distinctive color, luminous paint, or an arrowhead.
Navigational compass:-Chinese use of the navigational compass preceded that of Europe and the Middle East.
The typical Chinese navigational compass was in the form of a magnetic needle floating in a bowl of water.
Dry Compass:-The dry mariner's compass was invented in Europe around 1300. The dry mariner's compass consists of three elements.
This is suspended by a gimbal.The dry compass in China was a dry suspension compass, a wooden frame crafted in the shape of a turtle hung upside down by a board, with the lodestone sealed in by wax, and if rotated, the needle at the tail would always point in the northern cardinal direction.
Liquid Compass:-The liquid compass is a design in which the magnetized needle or card is damped by fluid to protect against excessive swing or wobble, improving readability while reducing wear.
The liquid inside the compass housing effectively damped shock and vibration, while eliminating excessive swing and grounding of the card caused by the pitch and roll of the vessel.This was used by United States Navy later Royal Navy as well.
Qibla compass:-This is used by Muslims to show the direction to Mecca for prayers.This compass has a blued steel needle with an open circle to indicate North. It is surmounted by a brass pyramidal pivot and a glass plate covers all. While the compass, like any other compass, points north, the direction of prayer is indicated by marks on the perimeter of the dial, corresponding to different cities, or by a second pointer set by the user according to their own location.
Nautical or Mariner's Compass:-One of the earliest human-made navigational tools used to aid mariners was the mariner's compass, which was an early form of the magnetic compass. Early mariners thought the mariner's compass was often inaccurate and inconsistent because they did not understand the concept of magnetic variation, which is the angle between true north (geographic) and magnetic north. It was primarily used when the Sun was not visible to help identify the direction from which the wind was blowing.