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,
Indonesia–Malaysia border Singapore and Middle Rocks to Malaysia by the ICJ. The sovereignty of South Ledge, which is submerged during high tide, will be determined later through the determination of territorial waters in which it is situated. While South Ledge lies closest to Middle Rocks and then Pedra Branca, the nearest shore to the marine feature is actually the northern shore of Indonesia's Bintan island. Singapore has indicated that its border with Indonesia in this area will consist of two stretches - one between the main Singapore island and Indonesia's Batam island, and the other between Singapore's Pedra Branca and Indonesia's Bintan