Territorial waters
The term territorial waters is sometimes used informally to refer to any area of water over which a sovereign state has jurisdiction, including internal waters, the territorial sea, the contiguous zone, the exclusive economic zone, and potentially the extended continental shelf. In a narrower sense, the term is used as a synonym for the territorial sea. Baseline. Normally, the baseline from which the territorial sea is measured is the low-water line along the coast as marked on large-scale charts officially recognized by the coastal state. This is either the low-water mark closest to the shore , or alternatively it may be an unlimited distance from permanently exposed land, provided that some portion of elevations exposed at low tide but covered at high tide (like mud flats) is within of permanently exposed land. Straight baselines can alternatively be defined connecting fringing islands along a coast, across the mouths of rivers, or with certain restrictions across the mouths of bays. In this case, a bay is defined as "a well-marked indentation whose penetration is in such proportion to the width of its mouth as to contain land-locked waters and constitute more than a mere curvature of  the coast. An indentation shall not, however, be regarded as a bay unless its area is as large as, or larger than, that of the semi-circle whose diameter is a line drawn across the mouth of that indentation". The baseline across the bay must also be no more than in length. Internal waters. Waters landward of the baseline are defined as internal waters, over which the state has complete sovereignty: not even innocent passage is allowed without explicit permission from said state. Lakes and rivers are considered internal waters. All "archipelagic waters" within the outermost islands of an archipelagic  state such as Indonesia or the Philippines are also considered internal waters, and are treated the same with the exception that innocent passage through them must be allowed. However, archipelagic states may limit innocent passage to designated sea lanes within these waters. Territorial sea. Territorial sea, as defined by the 1982 United Nations Convention on the Law of the Sea, is a belt of coastal waters extending at most from the baseline (usually the mean low-water mark) of a coastal state. The territorial sea is regarded as the sovereign territory of the state, although foreign ships (military and civilian ) are allowed innocent passage through it, or transit passage for straits; this sovereignty also extends to the airspace over and seabed below. Adjustment of these boundaries is called, in international law, maritime delimitation. A state's territorial sea extends up to from its baseline. If this would overlap with another state's territorial sea, the border is taken as the median point between the states' baselines, unless the states in question agree otherwise. A state can also choose to claim a smaller territorial sea. Conflicts have occurred whenever a coastal nation claims an entire gulf as its territorial waters while  other nations only recognize the more restrictive definitions of the UN convention. Claims which draw baseline in excess of 24 nautical miles (two 12 NM limits) are judged excessive by the U.S. Two conflicts occurred in the Gulf of Sidra where Libya drew a line in excess of and claimed the entire enclosed gulf as its territorial waters. The U.S. exercised freedom of navigation rights, resulting in the 1981 and 1989 Gulf of Sidra incidents. Contiguous zone. The contiguous zone is a band of water extending farther from the outer edge of the territorial sea to up to from the  baseline, within which a state can exert limited control for the purpose of preventing or punishing "infringement of its customs, fiscal, immigration or sanitary laws and regulations within its territory or territorial sea". This will typically be wide, but could be more (if a state has chosen to claim a territorial sea of less than 12 nautical miles), or less, if it would otherwise overlap another state's contiguous zone. However, unlike the territorial sea, there is no standard rule for resolving such conflicts and the states in question must negotiate their own compromise. The United States invoked a contiguous  zone out to 24 nmi from the baseline on 29 September 1999. Exclusive economic zone. An exclusive economic zone extends from the baseline to a maximum of , thus it includes the contiguous zone. A coastal nation has control of all economic resources within its exclusive economic zone, including fishing, mining, oil exploration, and any pollution of those resources. However, it cannot prohibit passage or loitering above, on, or under the surface of the sea that is in compliance with the laws and regulations adopted by the coastal State in accordance with the provisions of the UN Convention, within that  portion of its exclusive economic zone beyond its territorial sea. Before the United Nations Convention on the Law of the Sea of 1982, coastal nations arbitrarily extended their territorial waters in an effort to control activities which are now regulated by the exclusive economic zone, such as offshore oil exploration or fishing rights (see Cod Wars). Indeed, the exclusive economic zone is still popularly, though erroneously, called a coastal nation's territorial waters. Extended continental shelf. Definition. Article 76 gives the legal definition of continental shelf of coastal countries. For the physical geography definition, see the article continental shelf. The  continental shelf of a coastal nation extends out to the outer edge of the continental margin but at least from the baselines of the territorial sea if the continental margin does not stretch that far. Coastal states have the right of exploration and exploitation of the seabed and the natural resources that lie on or beneath it, however other states may lay cables and pipelines if they are authorised by the coastal state. The outer limit of a country's continental shelf shall not stretch beyond of the baseline, or beyond from the isobath, which is a line connecting the  depths of the seabed at 2,500 meters. The outer edge of the continental margin for the purposes of this article is defined as: The foot of the continental slope is determined as the point of maximum change in the gradient at its base. The portion of the continental shelf beyond the 200 nautical mile limit is also known as the extended continental shelf. Countries wishing to delimit their outer continental shelf beyond 200 nautical miles have to submit scientific information for the basis of their claim to the UN Commission on the Limits of the Continental Shelf. The Commission then  validates or makes recommendations on the scientific basis for the extended continental shelf claim. The scientific judgement of the Commission shall be final and binding. Validated extended continental shelf claims overlapping any demarcation between two or more parties are decided by bilateral or multilateral negotiation, not by the Commission. Countries have ten years after ratifying UNCLOS to lodge their submissions to extend their continental shelf beyond 200 nautical miles, or by 13 May 2009 for countries where the convention was ratified before 13 May 1999. As of 1 June 2009, 51 submissions have been lodged with the Commission, of which  eight have been deliberated by the Commission and have had recommendations issued. The eight are (in the order of date of submission): Russian Federation; Brazil; Australia; Ireland; New Zealand; the joint submission by France, Ireland, Spain and the United Kingdom; Norway and Mexico. For the full list, see below. Rights over the continental shelf. Articles 77 to 81 define the rights of a country over its continental shelf. A coastal nation has control of all resources on or under its continental shelf, living or not, but no control over any living organisms above the shelf that are beyond its exclusive  economic zone. This gives it the right to conduct hydrocarbon exploration and drilling works. Background. From the eighteenth century until the mid twentieth century, the territorial waters of the British Empire, the United States, France and many other nations were three nautical miles (5.6 km) wide. Originally, this was the distance of a cannon shot, hence the portion of an ocean that a sovereign state could defend from shore. However, Iceland claimed two nautical miles (3.7 km), Norway and Sweden claimed four nautical miles (7.4 km), and Spain claimed during this period. During incidents such as nuclear weapons testing and  fisheries disputes some nations arbitrarily extended their maritime claims to as much as fifty or even two hundred nautical miles. Since the late 20th century the "12 mile limit" has become almost universally accepted. The United Kingdom extended its territorial waters from three to twelve nautical miles (22 km) in 1987. During the League of Nations Codification Conference in 1930, the issue of establishing international legislation on territorial waters was raised, but no agreement was reached. Claims by legislation to the adjacent continental shelf and fishing was first made by the United States government immediately following the Second World War . On September 28, 1945, US President Harry S. Truman issued two proclamations that established government control of natural resources in areas adjacent to the coastline. One of these proclamation was titled "Policy of the United States With Respect to the Natural Resources of the Subsoil and Sea Bed of the Continental Shelf", and stipulated in its operative clause: the Government of the United States regards the natural resources of the subsoil and sea bed of the continental shelf beneath the high seas but contiguous to the coasts of the United States as appertaining to the United States, subject to its  jurisdiction and control. The second proclamation was titled "Policy of the United States With Respect to Coastal Fisheries in Certain Areas of the High Seas", and stated in its operative clause: the Government of the United States regards it as proper to establish conservation zones in those areas of the high seas contiguous to the coasts of the United States wherein fishing activities have been or in the future may be developed and maintained on a substantial scale. Following the US Presidential proclamation, the issue of legally determining territorial waters by international agreement was raised, and in its first session  in 1949, the International Law Commission of the United Nations added the subject to its agenda. The important issue of the breadth of territorial waters could not be resolved at either the UNCLOS I (1956-1958) or UNCLOS II (1960) conferences, with neither the two major contenders of a 3-mile or 12-mile limit reaching the required two-thirds support. This lack of agreement had the potential to lead to serious international disputes. It was only at the UNCLOS III (1973-1982) conference, whose provisions did not come into force until 1994, that this issue was resolved at twelve  nautical miles. Importance for Biodiversity. Territorial seas hold the vast store of the ocean’s wealth and riches. Extending up to 12 nautical miles from shore, these coastal waters make up only ~6% of the sea—yet they are where the ocean’s highest concentrations of biodiversity intersect with the areas of highest human need. Territorial seas are home to 100% of the world's mangroves, sea grass beds, and kelp forests, and 83% of the world's coral reefs. Importance for Food Security. Nearly 500 million people directly depend on the small-scale fisheries, most of which are found  within these areas. 40% of fish caught globally come from small-scale fisheries. Nearly all fish caught in small-scale fisheries goes to human consumption. Miscellaneous. Pirate radio broadcasting from artificial marine fixtures or anchored ships can be controlled by the affected coastal nation or other nations wherever that broadcast may originate, whether in the territorial sea, exclusive economic zone, the continental shelf or even on the high seas. Thus a coastal nation has total control over its internal waters, slightly less control over territorial waters, and ostensibly even less control over waters within the contiguous zones. However, it has  total control of economic resources within its exclusive economic zone as well as those on or under its continental shelf. Throughout this article, distances measured in nautical miles are exact legal definitions, while those in kilometres are approximate conversions that are not stated in any law or treaty. Federal nations, such as the United States, divide control over certain waters between the federal government and the individual states. (See tidelands.) Territorial sea claim. Maritime controversies involve two dimensions: (a) territorial sovereignty, which are a legacy of history; and (b) relevant jurisdictional rights and interests in maritime boundaries, which are mainly  due to differing interpretations of the law of the sea. Extended continental shelf claims. As of 13 May 2009, 51 submissions by 44 countries have been lodged for claims over their extended continental shelf. Some countries have multiple submissions and joint submissions with other countries. Recommendations have been given for 8 of the submissions. Submissions with recommendations. List with date of submission and adoption of recommendation by the Commission on the Limits of the Continental Shelf. Other submissions. List in order of date of submission, with date of submission.