The five marine states are classified based on the Beaufort Scale, which provides a standardized way to describe and categorize wave conditions at sea:
- Sea State 0: Calm sea with waves less than 0.1 meter (0.3 feet) high. The surface is smooth without foam ridge.
- Sea State 1: Smooth sea with ripples or small waves up to 0.5 meters (1.6 feet) in height. The surface appears glassy with some wave crests.
- SEA STAT 2: Light seas with waves 0.5 to 1.25 meters (1.6 to 4.1 feet) high. The surface shows many small wave crests.
- Sea State 3: Moderate sea with waves 1.25 to 2.5 meters (4.1 to 8.2 feet) high. There are larger waves with many Whitecaps and some spray.
- Sea State 4: Rough sea with waves 2.5 to 4 meters (8.2 to 13.1 feet) high. The sea surface is covered with large waves, white foam crests and heavy spray.
The five major seas, often called the five largest bodies of salt water that are smaller than the oceans, include:
- Mediterranean: located between Europe, Africa and Asia, it connects to the Atlantic Ocean via the Strait of Gibraltar.
- Caribbean Sea: located in the tropics of the Western Hemisphere, bordered by the Greater Antilles to the north and east and center and South America to the west and south.
- South China Sea: a marginal sea of the western Pacific Ocean, bordered by Southeast Asia, the Philippines, Taiwan and China.
- Bering Sea: separating Alaska and northeastern Siberia, it connects to the Arctic Ocean to the north.
- Gulf of Mexico: a large gulf in the Atlantic Ocean, bordered by the southeastern United States and Mexico.
Sea state 5 on the Beaufort scale is classified as “rough sea” conditions, characterized by waves with heights of 2.5 to 4 meters (8.2 to 13.1 feet). These conditions present a sea surface covered with large waves, white foam crests and heavy spray, making navigation difficult and dangerous, especially for small vessels.
Currently, there are five recognized oceans on Earth:
- Pacific Ocean: the largest and deepest ocean, extending from the Arctic to the Antarctic regions, touching Asia and Australia on the west side and the Americas on the east side.
- Atlantic Ocean: the second largest ocean, stretching from the Arctic to the Antarctic regions, bordered by Europe and Africa to the east and the Americas to the west.
- The Indian Ocean: the third largest ocean, located between Africa, Asia, Australia and Antarctica, connecting to the Atlantic Ocean via the southern tip of Africa.
- Southern (or Antarctic) Ocean: defined by the Antarctic Circumpolar Current, encircling Antarctica and extending to latitude 60°S.
- Arctic Ocean: the smallest and shallowest ocean, mostly ice-covered, located around the North Pole and bordered by parts of North America, Europe, and Asia.
The seven continents and five oceans, in order from largest to smallest, are:
- Asia
- Africa
- North America
- South America
- Antarctic
- Europe
- Australia (Oceania)
And the five oceans:
- Pacific Ocean
- Atlantic Ocean
- Indian Ocean
- Southern Ocean
- Arctic Ocean