King's Trough King's Trough King's Trough is an undersea trough in the Atlantic Ocean. It is located on the east side of the Mid-Atlantic Ridge, northwest of the Açores-Biscay rise and roughly 400 km NNE of the Azores. It is about 400 km long, running in a NW–SE direction. To the east it branches into the Peake Deep and Freen Deep. The center depth is 4500 m. Surrounding the trough are high ridges and seamounts, such as the Antialtair seamount and the Crum seamount complex. Various explanations for the complex have been suggested, ranging from compression a former plate-boundary, transform faulting or
Rockall to claim sovereignty for itself. The UK does not make a claim to extended EEZ based on Rockall, as it has ratified the United Nations Convention on the Law of the Sea (UNCLOS); this says that "rocks which cannot sustain human habitation or economic life of their own shall have no exclusive economic zone or continental shelf". However, such features are entitled to a territorial sea extending 12 nautical miles. With effect from 31 March 2014, the UK and Ireland published EEZ limits which resolved any disputes over the extent of their respective EEZs. In response to a Freedom of