Compass--this originated in China and made its way through Africa, the Muslim Empires and Europe.
The magnetic compass became important during sea voyages in navigating the direction of the boats. This method was more reliable especially when the sailors were unable to see the stars to direct navigation.
<u><em>A compass is device that indicates direction and it is one of the most important instruments for navigation</em></u>. Scientists think that the first compasses were developed in china in 11th or 12th century. It is considered that the compass may have reached Middle East and then to Europe. the compass had considerable impact on the sea travel in Mediterranean. As there was practise to stop sea travel during October and April, the compasses helped in development of better chart and the sailing season could start late in January or February and end in December. The additional months were of Economic importance and helped in increasing the economic activities.
