The Republic of Singapore Navy (RSN) has commenced operational patrols with its Maritime Security Unmanned Surface Vessels (MARSEC USVs) as of January 2025. These vessels, designed to bolster the security of Singapore’s vital waterways, operate alongside manned ships such as the Littoral Mission Vessels (LMVs) to address evolving maritime threats. The RSN’s initiative aims to enhance surveillance, interdiction, and persistence in monitoring the busy Singapore Strait.
The MARSEC USVs, developed in collaboration with the Defence Science & Technology Agency (DSTA) and Defence Science Organisation (DSO) National Laboratories, are equipped with cutting-edge autonomous navigation systems. These systems include a Collision Detection and Collision Avoidance (CDCA) algorithm, enabling the vessels to navigate safely through congested maritime environments. The CDCA system has undergone extensive testing, completing over 12 million km of simulated distance without collisions, equivalent to 26 years of real-world testing.
These unmanned vessels are resource-efficient, requiring only a two-man crew for remote operations. They are designed to be operated and maintained primarily by National Servicemen, with teams comprising Full-time and Operationally Ready National Servicemen, supported by a few regular servicemen. The USVs are equipped with advanced technology, including a 12.7mm Stabilised Weapon System, navigation radar, and a Global Positioning System, providing comprehensive capabilities for maritime security operations.
The RSN plans to continue experimenting with the MARSEC USVs to expand their operational scope, ensuring enhanced maritime security in Singapore’s congested waters.
