Waterways are the cheapest mode of transport. They carry heavy and bulky goods over long distances. They are mainly of two types-inland waterways and sea routes.
Inland Waterways - Navigable rivers and lakes are used as inland waterways. Some important inland waterways are the Ganga-Brahmaputra river system, the Great Lakes in North America and the river Nile in Africa.
Sea routes - Sea routes and oceanic routes are mostly used for transporting merchandise and goods from one country to another. These routes are connected with the ports. Some important ports are Singapore. Mumbai. Rio de Janerio, Sydney, etc.