"A boat is a watercraft of a large range of type and size. Ships are generally distinguished from boats based on their larger size, shape, and ...
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cargo or passenger capacity, and their ability to carry boats.
Small boats are typically found on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats, such as the whaleboat, were intended for use in an offshore environment. In modern naval terms, a boat is a vessel small enough to be carried aboard a ship. Anomalous definitions exist, as bulk freighters 1,000 feet (300 m) long on the Great Lakes being known as oreboats." - (en.wikipedia.org 30.09.2019)