Search results
Results from the WOW.Com Content Network
The history of the compass started more than 2000 years ago during the Han dynasty (202 BC – 220 AD). The first compasses were made of lodestone, a naturally magnetized stone of iron, in Han dynasty China. [1] [2] It was called the "South Pointing Fish" and was used for land navigation by the mid-11th century during the Song dynasty (960 ...
History [ edit ] One of the earliest known references to lodestone's magnetic properties was made by 6th century BC Greek philosopher Thales of Miletus , [ 12 ] whom the ancient Greeks credited with discovering lodestone's attraction to iron and other lodestones. [ 13 ]
A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.
Silva Sweden AB created their first compass in 1928, and established their company in 1933. Below is a Chronological timeline of important dates in the history of Silva Sweden AB: [3] 1928 Gunnar Tillander invents the first orienteering (baseplate) compass. [4] [5] [6]
Direction determination refers to the ways in which a cardinal direction or compass point can be determined in navigation and wayfinding.The most direct method is using a compass (magnetic compass or gyrocompass), but indirect methods exist, based on the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.
A compass must be balanced to counter the tendency of the needle to dip in the direction of the Earth's field. Otherwise, it will not spin freely. Often, compasses that are balanced for one latitude do not work as well at a different latitude. This problem was first reported by Georg Hartmann, a vicar in Nuremberg, in
Six Flags Over Texas in Arlington officially opened on Aug. 5, 1961, and Theresa Pool, 5, was the first visitor on opening day. — Star-Telegram Here are photos from the Star-Telegram’s ...
The compass's origins may be traced back to the Warring States period (476–221 BC), when Chinese people utilized a device known as a si nan to point in the right direction. During the early Song dynasty, a spherical compass with a small needle made of magnetic steel was created after steady development.