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We built ships even before we learned how to write history. From the primitive ships that could carry small crew and could not sail far from fear of breaking we today have floating cities that can survive any natural condition and last for years.
It is difficult to classify ships. They are generally made on the same principle - not to sink and because of that they have basically the same parts. Because of that they are classified according to their function. Read more about ships types and classifications.
Naval vessels are military ships and boats with precise purpose. These vessels improved throughout the history and new ones were invented to serve new demands of modern warfare. Here are some of them.
Ships can differ according to the material they were made of, what is their role, how they were designed, how many masts they have or what type of sails they carry. They changed in time and many of them are not in use anymore. Read about historical ships and its types.