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How Did Early European Explorers Find Their Way?

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Julie Anne B

on 30 April 2015

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Transcript of How Did Early European Explorers Find Their Way?

Astrolabe 1400's
An astrolabe is a ancient computer used for navigation. It solves problems to do with the time and where the stars and sun are in the sky. There have been many types of astrolabes made.
The most popular astrolabe (by a lot) is the planispheric astrolabe!
Early European Explorers used the compass in the 1500's.

A compass/compass rose is something that people use to navigate.
It has a magnetic pointer that shows which way is which.

North-North East-East-South East-South-South West-West-North West.
(N) (NE) (E) (SE) (S) (SW) (W) (NW)
Cross staff
The cross staff was believed to be invented in about 400BC.
In 1514 Johann Werner thought to use it for navigation.
A cross staff was a staff, usually 36 inches long, with smaller peices (different sizes) that slided across the staff. A cross staff can be only used to find altitude of a stars and planets.
There you have it! Four navigation tools used from 1400 to 1713! We really hope that you learned a lot and enjoyed our presentation. Thank you for your attention and have a great day. "IT'S GREAT TO BE AT IRC!!!!!":)

-Julie Anne & Maya
How Did Early European Explorers Find Their Way?
by: Julie Anne & Maya
Navigation Tools
Early European Explorers had to find their way around the world. But they didn't have the technology that we have now a days. All they used where their instincts and there navigation tools. But what tools did they use? Well your about to find out! In our presentation we will tell you about navigation tools Early European Explorers used in the 1400's-1713.


www.math.nus.edu.sg/aslaksen/gem-projects/hm/0203- 1.../cross_staff.htm
A quadrant is an early instrument used for measuring altitude of stars and planets consisting of a 90 degree arch with a moveable radius for measuring angles.

Radius: Foe example, the middle line on a protractor or a straight line in the middle of a circle.

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