Presential sea
A presential sea, (In Spanish: mar presencial) zone of maritime presence or heritage marine reserve is a zone of influence demarcated by a maritime country in the high seas adjacent to its exclusive economic zone (EEZ). The objective of this oceanopolitical concept or doctrine, is to signal to third parties where the coastal country's interests are, or could be directly involved.
Under this principle, a coastal nation (or several coastal nations, collectively) will demarcate areas of high seas contiguous or adjacent to their EEZ. Without claiming sovereignty over the international water in these areas, this demarcation serves as an announcement of a national interest in preserving the whole demarcated area from abusive uses or from certain activities whose proximity could impact marine resources inhabiting the nation's EEZ. A common stated intent is protecting highly migratory transboundary fish stocks from overfishing and ocean dumping.
The concept is currently not used officially by Argentina or Chile, as they adopted the extended continental shelf in their maps.