A band of open ocean adjacent to the coast, over which the coastal nation has control. It is generally either 3 or 12 nautical miles (5.6 or 22 km) wide.
the waters adjacent to a coastal state and extending seaward up to a limit not to exceed 12 miles from its baselines in which that state exercises complete sovereignty with the exceptions of innocent passage and transit passage.
The area of sea adjacent to Australia which extends beyond its land territory and internal waters. Australia's territorial sea extends 12 nautical miles from the baseline.
The ocean and seafloor area from mean low water seaward three nautical miles.
Every State has the right to establish the breadth of its territorial sea up to a limit not exceeding 12 nautical miles, measured from the baselines. Section 2of Part II of UNCLOS addresses the limits of the territorial sea in greater detail.
The territorial sea of the United States is a maritime zone extending beyond the land territory and internal waters of the United States over which the United States exercises sovereignty and jurisdiction, a sovereignty and jurisdiction that extend to the airspace over the territorial sea, as well as to its bed and subsoil.
The area from average low-water mark on the shore out to three miles for the states of Louisiana, Alabama, and Mississippi, and out to nine miles for Texas and the west coast of Florida. The shore is not always the base line from which the three miles are measured. In such cases, the outer limit can extend farther than three miles from the shore.
