Monsoon trough of the summertime Asian monsoon is in its normal orientation (oriented east-southeast to west-northwest), tropical cyclones along its periphery will move with a westward motion. If it reverses its orientation, orienting southwest to northeast, tropical cyclones will move more poleward. Tropical cyclone tracks with S-shapes tend to be associated with reverse-oriented monsoon troughs. The South Pacific convergence zone and South American convergence zones are generally reverse oriented. The failure of the monsoon trough, or the ITCZ, to move south of the equator in the eastern Pacific Ocean and Atlantic Ocean during the southern hemisphere summer, is considered one of the
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