Formidable class - FFG - Guided-Missile Frigate IMO: MMSI: Flight Deck: Call Sign: S6KL Shipyard: ST Marine Events ---Filter---LaunchedCommissioned History of RSS Tenacious 71 2005-jul-15LaunchedLaunched 2008-feb-05CommissionedCommissioned Add new event for this unitYear:Month: <- (1/12) Optional Day: <- (1/31) Optional Text: Add Event Aircraft Typical Max Republic of Singapore Air Force Sikorsky S-70B 11 Builder ST Marine, Benoi Road