The UAE coast stretches for nearly  along the southern shore of the Persian Gulf, briefly interrupted by an isolated outcrop of the Sultanate of Oman. Six of the emirates are on situated along the Persian Gulf, and the seventh, Fujairah is on the eastern coast of the peninsula with direct access to the Gulf of Oman.  Most of the coast consists of salt pans that extend 8–10 km inland. The largest natural harbor is at Dubai, although other ports have been dredged at Abu Dhabi, Sharjah, and elsewhere. Numerous islands are found in the Persian Gulf, and the ownership of some of them has been the subject of international disputes with both Iran and Qatar. The smaller islands, as well as many coral reefs and shifting sandbars, are a menace to navigation. Strong tides and occasional windstorms further complicate ship movements near the shore. The UAE also has a stretch of the Al Bāţinah coast of the Gulf of Oman. The Musandam Peninsula, the very tip of Arabia by the Strait of Hormuz, and Madha are exclaves of Oman separated by the UAE.