to 2013, while tourist arrivals increased from 690,000 to 1.13 million. The Department of Airports announced in October 2018 that it will conduct a feasibility study of an airport in the province. Six million baht is allocated for the study, to be completed in September 2019. Transportation Boat Satun is connected to Malaysian Langkawi Island by direct ferry service. Human achievement index 2017 Since 2003, United Nations Development Programme (UNDP) in Thailand has tracked progress on human development at sub-national level using the Human achievement index (HAI), a composite index covering all the eight key areas of human development. National Economic and Social Development Board (NESDB) has taken over this task since 2017. National parks Mu Ko Phetra National Park is a marine national park in the Strait of Malacca off Thailand, covering mostly intact coastal line, open water, and about 30 islands of the southern part of Trang province and the northern part of Satun province. Established on 31 December 1984, it is the 49th national park and 14th marine national park of Thailand. Thale Ban National Park is a forested area south of the Banthat Mountains in southern Thailand, in the south of Satun province bordering Malaysia; it borders Taman Negeri Perlis park. The park was established on 27 October 1980. It covers an area of of Khuan Don and Mueang Satun districts. Tarutao National Park is Thailand's second marine national park on 19 April 1974. The coastal Khao Sam Roi Yot National Park had been designated in 1966. Gallery References External links Website of the province Provinces of Thailand Southern Thailand Strait of Malacca