Editing Gepard-class frigate (section)

{{short description|Russian-built warships}}
{{Use dmy dates|date=April 2021}}
{|{{Infobox ship begin
| sclass = 2
}}
{{Infobox ship image
| Ship image = Gepard 3.9 frigate Quang Trung (016) of Vietnam People's Navy in MILAN2022 - 2.jpg
| Ship caption = ''Quang Trung'' - one of the two ships in the second batch of Gepard 3.9 built for the [[Vietnam People's Navy]]
}}
{{Infobox ship class overview
| Name = Gepard class (Project 1166.1)
| Builders = [[Zelenodolsk Plant Gorky]]
| Operators = *{{navy|Russia}}
*{{navy|Vietnam}}
| Class before = *{{sclass2|Koni|frigate|4}}
*{{sclass2|Grisha|corvette|4}}
| Class after = 
| Subclasses = *Project 11661 ''Tatarstan''
*Project 11661K ''Dagestan''
*Project 11661E Gepard:
**Gepard 3.9: Batch I; Batch II
**Gepard 5.1
**Gepard 5.3
| Cost = *11661E (Gepard 3.9 batch I): US$175 million per ship
*11661E (Gepard 3.9 batch II): US$350 million per ship (price included ammunition, maintenance packages signed between [[Vietnam]] and [[Russia]])
| Built range = 1991–2016
| In service range = 
| In commission range = 
| Total ships planned = 10
| Total ships completed = 6
| Total ships canceled = 2
| Total ships active = 6
| Total ships lost = 
| Total ships retired = 
| Total ships preserved = 
}}
{{Infobox ship characteristics
| Hide header = 
| Header caption = 
| Ship type = [[Frigate]]
| Ship displacement = *1,500 tons (standard)
*2,500 tons (Gepard 3.9)
| Ship length = *Approx {{convert|102.4|m|abbr=on}} (Gepard 3.9 batch II)
| Ship beam = *{{convert|13.09|m|abbr=on}}
* Approx {{convert|15|m|abbr=on}} (Gepard 3.9)
| Ship height = 
| Ship draught = {{convert|5.7|m|abbr=on}}
| Ship power = 
| Ship propulsion = Twin-shaft [[CODOG]], FPP, 2 × 14,300 + 1 × 6,000 (kW)
| Ship speed = {{convert|29|kn}}
| Ship range = {{convert|4000|nmi|km|-3|abbr=on}} at {{convert|10|kn|km/h|0}}
| Ship endurance = 20 days
| Ship complement = 94
| Ship sensors = *MR-231-1 ''Pal'' [[navigation radar]]
*''Mineral-ME'' shipborne multifunctional [[radar]] system (including guidance and target designation functions for [[cruise missile]]s)
*5P-26/MR-352 ''Pozitiv-ME1/-ME1.2'' 3D active shipborne radars
*5P-10E-03E ''Laska'' fire control radar for [[naval gun]] and [[CIWS]]
*[[Sonar]]: MGK-335EM-03 with under-keel antenna
| Ship EW = *[[Electronic warfare|EW Suite]]: 2 × Bell Shroud passive intercept, 2 × Bell Squat jammers,
*[[Countermeasure]]s: 4 × 16-barreled Pk-16 decoy launchers
| Ship armament = *Artillery: 
**1 × 76.2mm [[AK-176|AK-176M/MA]] [[naval gun]]
**2 × [[AK-630M]] [[CIWS]] (''Tatarstan'' and [[Vietnam People's Navy|VPN]] configuration)
*[[Cruise missile]]s:
**8 × UKSK [[Vertical launching system|VLS]] cells for [[Kalibr]] missiles (''Dagestan'') (up to 16x cells in configurations offered to the export market; options for [[Kalibr|Club-N]], [[Yakhont]] and [[BrahMos]] missile systems are available)
**2 × quadruple launchers (2×4) [[Kh-35]] anti-ship missiles (''Tatarstan'' and [[Vietnam People's Navy|VPN]]'s Batch I & II configuration)
*[[Anti-submarine warfare]]:
**2 × 533mm DTA-53 twin-tube (2×2) torpedo launchers (not featured on [[Vietnam People's Navy|VPN]]'s Batch I)
** [[Naval mine]]s
*[[Anti-air warfare]]:
**1 × [[Kashtan CIWS|Palash/Palma-SU CIWS]] featured with 8x [[Sosna-R]] [[short range air defense]] [[Surface-to-air missile|missile]]s (''Dagestan'' and [[Vietnam People's Navy|VPN]] configuration)
**1 × [[9K33 Osa|Osa-M]] twin-launcher for 20x 9M33M [[short range air defense]] [[Surface-to-air missile|missile]]s (''Tatarstan'')
**12 × [[Shtil-1]] [[Vertical launching system|VLS]] cells for 9M317ME medium-range [[surface-to-air missile]]s (offered configuration for the export market)
| Ship armour = 
| Ship armor = 
| Ship aircraft = 
| Ship aircraft facilities = 
| Ship notes = [https://zpkb.com/en/our-projects/voennye-korabli/gepard-3-9-frigate/]
}}
|}

The '''Gepard-class frigates''', Russian designation '''Project 11661''', is a [[Russia|Russian]] [[Ship class|class]] of [[frigate]]s that were intended as successors to the earlier {{sclass2|Koni|frigate|1}}s and {{sclass2|Grisha|corvette|5}}, and {{sclass2|Parchim|corvette|0}} [[corvette]]s. The first unit of the class, ''Yastreb'' (''Hawk''), was laid down at the [[Zelenodolsk, Republic of Tatarstan|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 {{As of|2012|lc=on}}.

[[Vietnam]] is the main operator of the class with [[Vietnam People's Navy|its navy]] having commissioned 4 frigates - twice the size of Russia's Project 11661 inventory - and having plans to order at least 2 more.