In modern times, many ships use onboard GPS systems to determine latitude and longitude. Previously, sailors used a sextant to determine the latitude of a ship.Know More
In ancient times, sailors embarking on long voyages measured the distance of Polaris, the North Star, above the horizon at their homeport. When they wanted to return to port, they sailed north or south until Polaris was the same height above the horizon and then east or west to return to port.
Sailors developed a better measuring device, called a kamal. A kamal is a string tied to a piece of wood. A sailor set the bottom edge of the wood to the horizon and the top edge on Polaris. He then tied a knot in the string to mark the distance from the wood to his mouth. When he wished to return to the same latitude, he placed the knot in his mouth and sailed northward or southward until the wood filled the space between the horizon and Polaris.
In the 10th century, Arabs introduced the quadrant and the astrolabe. A quadrant measures angles up to 90 degrees much more precisely than a kamal. An astrolabe is used to find the time or rising or setting celestial objects.
Sextants, which precisely measures the angle between two objects, were invented in the 18th century.Learn More
The seven important lines of latitude are the equator at 0 degrees, Tropic of Capricorn at 23.5 degrees south, Tropic of Cancer at 23.5 degrees north, Antarctic Circle at 66.5 degrees south, Arctic Circle at 66.5 degrees north, South Pole at 90 degrees south and North Pole at 90 degrees north. Latitude is an imaginary line that encircles the planet and runs parallel to the equator.Full Answer >
There are 180 lines of latitude assigned to the surface of the Earth, not including the equator. Latitude is measured as degrees above or below the equator, which sits at zero degrees and acts as the basis for measurement.Full Answer >
The tundra biome is at the latitude of 65 degrees north, extending towards the North Pole and encircling the Arctic Ocean. It is the coldest biome and the simplest, at least in terms of flora and fauna diversity.Full Answer >
To convert latitude and longitude to decimal notation, you must find the degrees, divide the minutes by 60 and divide the seconds by 3,600. Finally, add these three numbers together, and determine if the answer is positive or negative.Full Answer >