The southern, and by far the longest section, of the frontier starts in the north on the Oman Gulf coast, just south of Kalba in the Emirate of Sharjah. It then proceeds inland roughly south-westwards via a series of irregular lines, arcing southwards so as to include Hatta within the UAE; the border then proceeds roughly south-westwards down to the Omani tripoint, save for a piece of Emirati territory south-east of Al-Ain that juts into Oman.