Indonesia–Malaysia border crossings. Illegal immigrants are also known to use such crossings. There are numerous scheduled sea crossings between Indonesia and Malaysia, mostly between ports in the former's island of Sumatra and Peninsula Malaysia. Here is a list of ports (Indonesian port followed by the Malaysian port) where scheduled boat services operate as of April 2008: Sumatra-Peninsula Malaysia North Kalimantan-Sabah Indonesia–Malaysia border The border between the Southeast Asian countries of Indonesia and Malaysia consist of both a land border separating the two countries' territories on the island of Borneo as well as maritime boundaries along the length of the Straits of Malacca,
Brunei–Malaysia border necessary details, will be lodged at a later date. Brunei Bay Unlike the maritime boundaries in the South China Sea, news regarding the effects of the 2009 Exchange of Letters on the maritime boundary between the two countries in Brunei Bay has been virtually non-existent. To date, the only news regarding efforts to determine the boundary in Brunei Bay came after the 18th Annual Leaders’ Consultation between Malaysia and Brunei on 3 November 2014. The joint statement issued after the consultation stated that a Standard Operating Procedure for the joint hydrographic survey for the maritime boundary from the Pandaruan River