Navy unveils new maritime security flotilla, with armed ships that can go alongside vessels quickly Toggle share menu Advertisement RSN crew keep watch in a littoral mission vessel. (Photo: MINDEF) 26 Jan 2021 02:40PM) Share this content Bookmark SINGAPORE: The Republic of Singapore Navy (RSN) on Tuesday (Jan 26) inaugurated its new Maritime and Security Response Flotilla (MSRF), aimed at boosting Singapore's maritime security capabilities. The new flotilla will initially operate four Sentinel-class maritime security and response vessels (MSRV) and two maritime security and response tugboats (MSRT). Advertisement Advertisement The MSRVs are equipped with a range of capabilities for more calibrated options against a range of maritime security threats.