High Quality Content by WIKIPEDIA articles! The Formidable class multi-role stealth frigates are the latest surface platforms to enter into service with the Republic of Singapore Navy, and are multi-mission derivatives of the French Navy’s La Fayette class frigate. The frigates are key information nodes and fighting units, and are described as "by far the most advanced surface combatants in Southeast Asia." The six ships form the 185 Squadron of the RSN.