Sea Routes

The oceans provide a natural, smooth highway that is traversable in all directions and requires no maintenance costs. The key human achievement here is the transformation of this open water into a deliberate routeway using sea-going vessels — a significant step in adapting the physical environment for transport.

Compared to land and air, ocean transport is the cheapest means of haulage (carrying loads) for bulky materials over long distances from one continent to another. This cost advantage makes it the backbone of global trade for commodities like oil, grain, iron ore, and coal.

Modern ships are far from simple vessels. Passenger liners and cargo ships are now equipped with radar, wireless communication, and other advanced navigation aids. Several technological developments have further improved cargo transport:

• Refrigerated chambers allow the safe carriage of perishable goods (food, medicines) across long voyages.
• Tankers are specialised ships designed to carry liquids in bulk, most notably crude oil and petroleum products.
• Specialised ships have been built for specific cargoes, such as bulk carriers for ore or container ships for general goods. …