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1. Engineering the Medieval Achievement|Shipping Systems|Ship Routes and Uses

Shipping and trade routes

http://web.mit.edu/21h.416/www/shippingtechnology/shiproutesanduses.html

Rating: [0.00] Votes: [0] Hits: [48] | 8 Mar 2013

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2. The Mariner's Astrolabe Popular

The Mariner's Astrolabe was used to determine the latitude of a ship at sea by measuring the noon altitude of the Sun or the meridian altitude of a star of known declination. It was a predecessor of the sextant.

http://www.astrolabes.org/mariner.htm

Rating: [0.00] Votes: [0] Hits: [111] | 27 Apr 2011

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