The document summarizes key aspects of the UN Convention on the Law of the Sea (UNCLOS), including its establishment in 1982 with 320 articles and 9 annexes. It discusses UNCLOS provisions on the territorial sea, including the breadth of 12 nautical miles, how baselines are measured, and sovereignty and jurisdiction within the territorial sea. It also summarizes the rights of innocent passage for ships through territorial seas and the immunity of warships from coastal state jurisdiction.