Burt's solar compass or astronomical compass/sun compass is a surveying instrument that makes use of the Sun's direction instead of magnetism. William Austin Burt invented his solar compass in 1835. The solar compass works on the principle that the direction to the Sun at a specified time can be calculated if the position of the observer on the ...

Solar compass, type of navigational instrument that uses the position of the Sun to establish bearing. The solar compass operates somewhat like a sundial. It indicates direction by employing the angle of the shadow cast by the Sun in conjunction with a compass card, a …

Desert innovator: Bagnold's sun-compass. The Long Range Desert Group were masters of navigation and one of Britain’s most famous special forces. They owed much of their success to the scientific talents of their first commander, Major Ralph Bagnold, whose sun-compass invention revolutionised desert travel.

Compasses that used the angle and length of the sun's shadow to determine the position of the north were used throughout of human history in several forms, ranging from simple techniques used in ancient Greece and Rome to the caved half-discs of Viking sailors that could not only work during the day, but also very reliable (with just a few per...

The solar compass, a surveying instrument that makes use of the sun's direction, was first invented and made by William Austin Burt. He patented it on February 25, 1836, in the United States Patent...

Sun compass may mean: Sun compass in animals, the innate ability of some animals to orientate themselves by the sun; Solar compass, a 19th-century surveying instrument that made use of the sun's direction

2019年6月25日 · A shadow board is a non-magnetic compass that uses the sun as it's principal way to determine direction. This discovery is believed to have originated with the Vikings of the eleventh-century and though isn't practiced today it's still a valid method.

1985年5月1日 · Here's some information resources on conventional magnetic compasses, and instructions on setting up a sun compass if you don't have one.

Sun compass All metal sun compass in wooden box which also contains two gnomons. Brass dial with black divisions etc. Box is painted black and lined with green baize.