International Regulations for Preventing Collisions at Sea

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The International Regulations for Preventing Collisions at Sea 1972 also known as Collision Regulations (COLREGs) are published by the International Maritime Organization (IMO) and set out, among other things, the "rules of the road" or navigation rules to be followed by ships and other vessels at sea to prevent collisions between two or more vessels.^[1][2] COLREGs can also refer to the specific political line that divides inland waterways, which are subject to their own navigation rules, and coastal waterways which are subject to international navigation rules. They are derived from a multilateral treaty called the Convention on the International Regulations for Preventing Collisions at Sea^{[citation needed]}, also known as Collision Regulations of 1960.^[3]

Although rules for navigating vessels inland may differ, the international rules specify that they should be as closely in line with the international rules as possible. In most of continental Europe, the Code Européen des Voies de la Navigation Intérieure (CEVNI, or the European Code for Navigation on Inland Waters) apply. In the United States, the rules for vessels navigating inland are published alongside the international rules.^[4]

The Racing Rules of Sailing, which govern the conduct of yacht and dinghy racing under the sanction of national sailing authorities which are members of World Sailing, are based on the COLREGs, but differ in some important matters such as overtaking and right of way close to turning marks in competitive sailing.^{[not verified in body]}