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A compass is a navigational instrument for determining direction relative to the Earth's magnetic poles. It consists of a magnetized pointer (usually marked on the North end) free to align itself with Earth's magnetic field. The compass greatly improved the safety and efficiency of travel, especially ocean travel. A compass can be used to calculate heading, used with a sextant to calculate latitude, and with a marine chronometer to calculate longitude. It thus provides a much improved navigational capability that has only been recently supplanted by modern devices such as the Global Positioning System (GPS). A compass is any magnetically sensitive device capable of indicating the direction of the magnetic north of a planet's magnetosphere. The face of the compass generally highlights the cardinal points of north, south, east and west. Often, compasses are built as a stand alone sealed instrument with a magnetized bar or needle turning freely upon a pivot, or moving in a fluid, thus able to point in a northerly and southerly direction. The compass was invented in ancient China sometime before the 2nd century, and was used for navigation by the 11th century. The dry compass was invented in medieval Europe around 1300. This was supplanted in the early 20th century by the liquid-filled magnetic compass.
Other, more accurate, devices have been invented for determining north that do not depend on the Earth's magnetic field for operation (known in such cases as true north, as opposed to magnetic north). A gyrocompass or astrocompass can be used to find true north, while being unaffected by stray magnetic fields, nearby electrical power circuits or nearby masses of ferrous metals. A recent development is the electronic compass, or fibre optic gyrocompass, which detects the magnetic directions without potentially fallible moving parts. This device frequently appears as an optional subsystem built into GPS receivers. However, magnetic compasses remain popular, especially in remote areas, as they are cheap, durable, and require no electrical power supply.
The sole B7RLE on Teesside, Compass Royston's NX59 BYC on the once-a-day 66x (not x66 as the display shows) to Middlesbrough via Teesside Park.
The Advanced Tactical Racing Compass. Designed in response to the rising cost and lack of development in existing dinghy compasses
One day whilst cleaning out my shed, I found this item. I thought is was interesting enough to take a photo of.
Whilst these items are not for sale, if anyone knows it's value, please send me a comment.
If anyone knows any background about the item, please send me a comment.
Photo taken with a Canon 30D in Macro mode. The lens was a 18-55 mm and a macro light was used. The item was placed into a light tent.
2009
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Compass Song is an app-based public sound artwork inspired by Times Square’s rich history as the Crossroads of the World. Artists Mendi + Keith Obadike have stretched fragments of music, poetry, stories, and myths across the pedestrian plazas and surrounding blocks in all four cardinal directions, for visitors to discover whether they’re exploring the neighborhood or simply on their way to work. Compass Song was commissioned by and created in residence with Times Square Arts. Photo courtesy of Ian Douglas for Times Square Arts.
Got books? My friend Misty just wrote her first, and my kid found it at Compass Books at Disneyland tonight!
Compass Royston's sole service in the Middlesbrough area to serve the Bus Station is the 686 linking the town centre with Middlehaven. GX55 is seen on its stand having arrived in on the every 12 minutes, 10 minute round trip service.