第1个回答 2007-12-23
Before compass invention the humanity takes one's bearings mainlydepends on the sun, heavenly body and so on the moon, or sign and soon mountain stone trees, however, these take one's bearings the methodall has its limitation: Depends on the heavenly body to take one'sbearings under the bad weather environment is unable to realize, forinstance rainy day, foggy day, cloudy day But depends on the sign totake one's bearings only can limit in the small scope
Afterwards the people discovered the magnet the south North Polecharacteristic has invented the compass Thus may accurate take one'sbearings under any environment
The compass biggest contribution promoted the navigation development,the sea transportation the new continent compass and so on wasdeveloped as well as discovered all had lasting achievements
第2个回答 2008-01-05
before the invention of the compass, people decided the directions mainly by the sun, the moon, and other asteral bodies, or landmarks such as mountains, stones, and trees. but, these methods has their restrictions:you cannot depend on a asteral body when the weather is bad, for instance, during rain, fog,and overcast days. while using landmarks only work within a small area.
Later, people discovered the polarity of magnets and invented the compass and can now determine directions under any circunstances. the compass's greatest contribution is that it promoted marine development, transportation by sea and the discovery of new continents are all achievements of the compass.