The Koni class is the NATO reporting name for an anti-submarine warfare frigate built by the Soviet Union . 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 Riga-class frigates , 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 for training foreign crews. Only a few of these vessels remain in service today.
13-470: The Romanian Tetal-class corvettes were similar. The armament consisted of two AK-726 twin 76 mm (3.0 in) gun mountings and two AK-230 twin 30 mm (1.2 in) anti-aircraft guns, 4 P-15M Termit anti-ship missile launchers were fitted in some ships, depth charge and naval mine racks were fitted at the stern. The Libyan vessels had a redesigned layout with the P-15M missiles forward of
26-436: A 12.75-inch (324 mm) diameter for light torpedoes (deck mounted aboard ship) or a 21-inch (533 mm) diameter for heavy torpedoes (underwater tubes), although torpedoes of other classes and diameters have been used. A submarine torpedo tube is a more complex mechanism than a torpedo tube on a surface ship, because the tube has to accomplish the function of moving the torpedo from the normal atmospheric pressure within
39-674: A complement of 98. The vessels were constructed at the Mangalia Shipyard for the Romanian Naval Forces . The first ship to commission was Amiral Petre Bărbuneanu in 1983. Three more corvettes would follow before the project was terminated in 1987 in favour of a new design that incorporated a helicopter flight deck . In 2004, two of the corvettes, Vice-Amiral Vasile Urseanu and Vice-Amiral Vasile Scodrea were decommissioned . The remaining ships are based at Constanța . Torpedo tube A torpedo tube
52-443: A range of 16 kilometres (9.9 mi) and fire up to 90 rounds per minute. For anti-aircraft (AA) defence, the corvettes have four AK-230 30 mm (1.2 in)/65 calibre AA guns in two twin mounts positioned aft, forward of the aft 76 mm turret. The 30 mm guns have a range of 4 km (2.5 mi) and can fire up to 500 rounds per minute. They also mount two single-mounted 14.5 mm (0.57 in) machine guns along
65-792: A total of the four are still in service. Designed and constructed in the 1980s, they are a product of the Cold War with their armament and sensors based on Soviet designs. This class of corvettes was superseded by the Rear-Admiral Eustațiu Sebastian (Tetal-II) class . The Admiral Petre Bărbuneanu class was based on the Soviet Navy 's Koni-class frigate but designed in Romania to a smaller size, though retaining their anti-submarine warfare (ASW) role. They incorporated Soviet weapons and sensors into their design. Vessels of
78-517: Is a cylindrical device for launching torpedoes . There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers ) installed aboard surface vessels. Deck-mounted torpedo launchers are usually designed for a specific type of torpedo, while submarine torpedo tubes are general-purpose launchers, and are often also capable of deploying mines and cruise missiles . Most modern launchers are standardized on
91-516: The bridge . The ships had contemporary Soviet radar and sonar. The ships had 3-shaft CODAG machinery suite, identical to that used in the Grisha-class corvettes (Project 1124). The middle shaft had an 18,000 hp (13,000 kW ) gas turbine while the outer two shafts had diesel engines with 9,000 hp (6,700 kW) in total for economical cruising. On July 16, 1998 the former Cuban Navy Koni II-class frigate designated 353
104-541: The Varadero area refer to the dive site as Patrol Boat 383 or simply P.B even though it is a frigate. Cave dive sites: Admiral Petre B%C4%83rbuneanu-class corvette The Admiral Petre Bărbuneanu -class corvette (also known as the Tetal-I class by NATO ) is a series of four corvettes designed and constructed for the Romanian Naval Forces primarily for anti-submarine warfare . Only two corvettes out of
117-941: The amidships. For ASW purposes, the Admiral Petre Bărbuneanu class mounts RBU 2500 16-tubed ASW rocket launchers that are trainable with a range of 2,500 m (8,200 ft). The ships have four 533 mm (21.0 in) torpedo tubes in two twin mounts situated aft to either side of the aft 76 mm gun turret. They can fire Type 53-65 torpedoes which have a range of 25 km (16 mi). Admiral Petre Bărbuneanu -class corvettes are equipped with Soviet MR-302 (NATO reporting name: Strut Curve) air search/surface search radar , MR-104 Rys (NATO reporting name: Drum Tilt) and MR-105 Turel (NATO reporting name: Hawk Screech) fire control radar . They have Hercules MG-22 hull-mounted sonar for underwater search and two PK 16 chaff launchers and RW-23 (NATO reporting name: Watch Dog) electronic support measures . The corvettes have
130-518: The breech door and muzzle door from opening at the same time. The submarine torpedo launch sequence is, in simplified form: Spare torpedoes are stored behind the tube in racks. Speed is a desirable feature of a torpedo loading system, but safety is paramount. There are various manual and hydraulic handling systems for loading torpedoes into the tubes. Prior to the Ohio class , US SSBNs utilized manual block and tackle which took about 15 minutes to load
143-636: The class have a full load displacement of 1,440 tonnes (1,420 long tons ) and measure 92.4 metres (303 ft 2 in) long with a beam of 11.7 m (38 ft 5 in) and a draught of 3 m (9 ft 10 in). The ships are powered by four diesel engines driving four shafts creating 15,000 kilowatts (20,000 bhp ). This gives the corvettes a maximum speed of 24 knots (44 km/h; 28 mph). The vessels are armed with four Soviet-designed AK-276 76-millimetre (3.0 in)/59 calibre guns in two twin turrets with one turret situated forward and aft. The 76 mm guns have
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#1732768915696156-433: The submarine into the sea at the ambient pressure of the water around the submarine. Thus a submarine torpedo tube operates on the principle of an airlock . The diagram illustrates the operation of a submarine torpedo tube. The diagram is somewhat simplified but does show the working of a submarine torpedo launch. A torpedo tube has a considerable number of interlocks for safety reasons. For example, an interlock prevents
169-570: 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 90 ft (27 m) of water. For an unknown reason her hull number was changed from 353 to 383 prior to the scuttling. The dive operators in
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