The Russian Gepard-class frigates, Russian designation Project 11661, is a class of frigates that were intended as successors to the earlier s and , and corvettes. The first unit of the class, Yastreb (Hawk), was laid down at the Zelenodol'sk Zavod shipyard at Tatarstan in 1991. She was launched in July 1993, after which she began fitting out; fitting was nearly completed by late 1995, when it was suspended due to lack of funds. Renamed Tatarstan, the ship was finally completed in July 2002, and became the flagship of the Caspian Flotilla. She has two sister ships, Albatross (renamed Dagestan), and Burevestnik (Storm Petrel), which was still under construction . The foreign customer Vietnam is the main operator of the class when its navy has commissioned at least 4 frigates - twice the size of Russia's Project 11661 frigates - while having plans to order at least 2 more. Design These vessels are capable of employing their weapons systems in conditions up to Sea State 5. The hull and superstructure are constructed primarily of steel, with some aluminium-magnesium being used in the upper superstructure. They are equipped with fin stabilizers and twin rudders, and can use either gas turbines or diesel for propulsion in a CODOG configuration. Gepard is Russian for cheetah. Service history In October 2015, Dagestan, in company with three other Russian Navy ships serving with the Caspian Flotilla, launched cruise missiles at targets in Syria. The missiles flew nearly over Iran and Iraq and struck targets in Raqqa and Aleppo provinces (controlled by the Islamic State) as well as Idlib province (controlled by the al-Qaeda-linked Nusra Front). Peshmerga forces (Kurdish armed forces located in northern Iraq) published a video allegedly depicting two cruise missiles mid-flight en route to Syria. Export The Gepard-class was designed from the outset as a lightweight, inexpensive export vessel. Russia offers three variants of the class to the market: Gepard 3.9: designed to search, track and fight against surface, underwater and air enemy independently and within task force, plant mine fields, provide protection and patrol of maritime state border and exclusive economic zone, perform combat missions, patrol service. Powered by gas-turbine engines with CODOG configuration. Fitted with two inclined quadruple launchers for eight Kh-35 anti-ship missiles with alternative options to be featured with VLS systems such as UKSK (for cruise missiles such as Club-N and Yakhont) and Shtil-1 air-defense system. Being the only