Operating within the crowded littoral waters of the Singapore Strait, the RSN is widely regarded as one of the most highly sophisticated and well trained in the region.[2][3] It conducts regular operations with the Royal Malaysian Navy and Indonesian Navy to combat piracy and terrorist threats.[4][5][6] To provide air surveillance of the seaward approaches to Singapore, the RSN also jointly operates maritime patrol aircraft with its counterparts from the RSAF to ensure the security of one of the busiest sealanes in the world.[7]