Ocean shipping, or ocean freight, involves transporting products by sea, using large vessels typically full of containers. While it is a slow freight option, it is also the most cost-effective.

The transit time for ocean freight depends on several factors including distance, shipping mode, route, and season.

Multiple national and international organizations regulate ocean shipping. For example, the Federal Maritime Commission (FMC) regulates the U.S. international ocean transportation system. Meanwhile, the International Maritime Organization (IMO) is a specialized agency of the United Nations responsible for ensuring safety at sea, preventing marine and air pollution from ships, and promoting the efficiency and security of maritime operations.

It is estimated that approximately 80 percent of products are transported by ships. Ocean shipping is a crucial component of the global supply chain, supporting the majority of industries and serving as the backbone of international trade.