The Koni class is the NATO reporting name for an

anti-submarine warfare Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations are t ...

frigate built by the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

. They were known in the Soviet Union as Project 1159. 14 were built in Zelenodolsk shipyard between 1975 and 1988. They were originally intended to replace the older s, but were instead chosen as a design for export to various friendly navies. The Koni I sub class were designed for European waters and the Koni II were made for warmer waters. One ship was retained by the Soviets in the

Black Sea The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Rom ...

for training foreign crews. Only a few of these vessels remain in service today. The Romanian Tetal-class corvettes were similar.

Design

Armament

The armament consisted of two AK-726 twin gun mountings and two AK-230 twin anti-aircraft guns, 4 P-15M Termit anti-ship missile launchers were fitted in some ships, depth charge and

naval mine A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any ...

racks were fitted at the stern. The Libyan vessels had a redesigned layout with the P-15M missiles forward of the

bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...

. The ships had contemporary Soviet radar and sonar.

Propulsion

The ships had 3-shaft

CODAG Combined diesel and gas (CODAG) is a type of propulsion system for ships that need a maximum speed that is considerably faster than their cruise speed, particularly warships like modern frigates or corvettes. Pioneered by Germany with the , a CO ...

machinery suite, identical to that used in the s (Project 1124). The middle shaft had an

gas turbine A gas turbine, also called a combustion turbine, is a type of continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the directio ...

while the outer two shafts had

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...

s with in total for economical cruising.

Ships in class

MV ''Captain Keith Tibbetts''

In September 1996 a former

Cuban Navy The Cuban Revolutionary Navy ( es, Marina de Guerra Revolucionaria) is the navy of Cuba. History The Constitutional Navy of Cuba was the navy of Cuba that existed prior to 1959. During World War II, it sank the German submarine ''U-176'' on 15 ...

Koni II-class frigate designated ''356'' was

scuttled Scuttling is the deliberate sinking of a ship. Scuttling may be performed to dispose of an abandoned, old, or captured vessel; to prevent the vessel from becoming a navigation hazard; as an act of self-destruction to prevent the ship from being ...

in shallow water in

Cayman Brac Cayman Brac is an island that is part of the Cayman Islands. It lies in the Caribbean Sea about north-east of Grand Cayman and east of Little Cayman. It is about long, with an average width of . Its terrain is the most prominent of the th ...

. This ship was built in 1984 as one of three Koni II-class frigates sold to

Cuba Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbea ...

to support its Cold War fleet. In 1996 the ship was purchased from Cuba by the Cayman Islands government to be scuttled in Cayman Brac as a dive attraction. The remaining two Cuban Koni II class were expended as targets. Frigate ''356'' was sunk upright, and initially her deck rested below the surface. A serious storm in 2004 broke the ship in two, and her bow now lists at a 45 degree angle, while her midships have become a debris field. Before being sunk the ship was renamed ''Captain Keith Tibbetts'' after a local politician and diver. It is one of only a few sunken Soviet Naval vessels in the

Western Hemisphere The Western Hemisphere is the half of the planet Earth that lies west of the prime meridian (which crosses Greenwich, London, United Kingdom) and east of the antimeridian. The other half is called the Eastern Hemisphere. Politically, the te ...

, and the only one of two that is easily dived including her sister ship ''SKR-451''.

''Patrol Boat 383'', ''P.B.''

On July 16, 1998 the former Cuban Navy Koni II-class frigate designated ''353'' was scuttled in shallow water near the Cuban resort town of Varadero in the Parque Submarino Cayo Piedra del Norte as an attraction for divers. It is rumored that Fidel Castro promoted the project, being an avid diver himself. The frigate sank upright, and sits on the sand bottom in of water. For an unknown reason her hull number was changed from ''353'' to ''383'' prior to the scuttling. The dive operators in the Varadero area refer to the dive site as ''Patrol Boat 383'' or simply ''P.B'' even though it is a frigate.

Original operators

* Soviet Union - 1 (to

Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedo ...

in 1990), ''Delfin'' was originally used for training foreign crews in the Black Sea, before being sold to the

Bulgarian Navy The Bulgarian Navy ( bg, Военноморски сили на Република България, Voennomorski sili na Republika Balgariya, lit=Naval Forces of the Republic of Bulgaria) is the navy of the Republic of Bulgaria and forms part of ...

, currently in service as ''Smeli'' (Bulgarian: Смели" ("Brave")). *

Algeria ) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , relig ...

- 3, in service, being upgraded with new electronics, ASW torpedo tubes and 8 x Kh-35 Uran/SS-N-25 Switchblade anti-ship missiles *

- 3, 356 (No name) ex ''SKR-471'' sunk as a

reef A reef is a ridge or shoal of rock, coral or similar relatively stable material, lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic processes— deposition of sand, wave erosion planing down rock o ...

, 353 (later 383) (''Monkada'' or ''Moncada'') ex ''SKR-451'' sunk as a

and 350 (''Mariel'') ex ''SKR-28'' status unknown. *

East Germany East Germany, officially the German Democratic Republic (GDR; german: Deutsche Demokratische Republik, , DDR, ), was a country that existed from its creation on 7 October 1949 until its dissolution on 3 October 1990. In these years the state ...

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

- 3, two (''Rostock'' and ''Halle'') taken over by unified

German Navy The German Navy (, ) is the navy of Germany and part of the unified ''Bundeswehr'' (Federal Defense), the German Armed Forces. The German Navy was originally known as the ''Bundesmarine'' (Federal Navy) from 1956 to 1995, when ''Deutsche Mari ...

and paid off August 1991, one (''Berlin - Hauptstadt der DDR'') immediately put up for disposal in 1991.Conway 1995, p. 135 *

Libya Libya (; ar, ليبيا, Lībiyā), officially the State of Libya ( ar, دولة ليبيا, Dawlat Lībiyā), is a country in the Maghreb region in North Africa. It is bordered by the Mediterranean Sea to the north, Egypt to the east, Suda ...

- 1 (formerly 2), 4 x 406mm torpedo tubes, status unknown, damaged by bombing May 19/20 and on August 9, 2011. (''Al Ghardabia''). The remaining ship, ''Al Hani'' captured by

National Transitional Council The National Transitional Council of Libya ( ar, المجلس الوطني الإنتقالي '), sometimes known as the Transitional National Council, was the ''de facto'' government of Libya for a period during and after the Libyan Civil War ...

in Benghazi, and has become the flagship of the reorganized Libyan Navy. *

Yugoslavia Yugoslavia (; sh-Latn-Cyrl, separator=" / ", Jugoslavija, Југославија ; sl, Jugoslavija ; mk, Југославија ;; rup, Iugoslavia; hu, Jugoszlávia; rue, label=Pannonian Rusyn, Югославия, translit=Juhoslavija ...

- acquired two ships, ''Split'' (VPBR-31) and ''Koper'' (VPBR-32), during the 1980s.

References

*
Marinekameradschaft KSS

PALUBAinfo Forum
*

Militaryfactory.com Koni Class frigate
{{Recreational dive sites, wresit Frigate classes Ships of the Soviet Navy Frigates of the Soviet Union