The Third United Nations Conference on the Law of the Sea is attempting to codify international law for the use of ocean space. While the process of negotiations continues and many political-legal problems remain to be solved, certain issues appear to be at, or near, a stage of general agreement. A major element of the emerging consensus involves the “baseline,” the line from which all claims to zones of sovereignty or jurisdiction are measured. In addition, the Conference has generally accepted a breadth of 12 nautical miles for the sovereign territorial sea and 200 nautical miles for a coastal state zone of economic competence. An acceptable definition, in a legal sense, of the continental shelf seems to be provided. A major problem in the division of ocean space among States involves the delimitation of boundaries between adjacent States—those sharing a common land boundary—and opposite States—those situated so as to face each other across bodies of water. The issue remains divisive. The final treaty or convention, if successfully negotiated, will not, however, address technical issues. These important problems will have to be resolved by scientists and technicians concerned with the earth measurements in the post-treaty era.
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