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Project 266 Akvamarin class


NATO: Yurka class


Overview


Project 266 Akvamarin class

Aerial view of Soviet Project 266 Akvamarin (NATO: Yurka) class ocean going minesweeper seen at sea.
Source: Unknown author - © Copyright lies with original owner

Origin
Soviet Union
Type
Ocean going minesweeper
Entered service
1964
Status
Limited service
Development
Late 1950's
Developer
Soviet Union
Production
1960 - 1971
Producer
Soviet Union - Sredne-Nevskiy shipyard
Soviet Union - Khabarovsk shipyard
Number produced
45 (some sources indicate 52)
Designations
Yurka class (NATO reporting name)
Project 266E (export model)
Notable users
Soviet Union
Egypt
Vietnam

Description


Introduction

Project 266 Akvamarin is class of mid Cold War era ocean going minesweepers of Soviet origin. These were designed to replace the Project 254 (NATO: T-43) class of minesweepers introduced just after World War 2. This class is known in NATO as the Yurka class.

Design

These ships feature a swept bowline and small superstructure. The stern is low to facilitate access to the water. This class is made of low-magnetic steel and many onboard devices are low-magnetic as well, such as the AK-230M variant of the regular AK-230. The engines are suspended on rafters that rest on rubber blocks to reduce noise and vibrations. The crew consists of 56 people which can remain at sea for 7 days.

Firepower

The armament on the Project 266 is mainly intended for self-defense. Two twin barrel 30mm AK-230M naval guns are installed. These can be used against aerial and surface targets and even have a limited close-in weapon system capability. Air defense is augmented by MTP-4 quadruple launchers for 9K34 Strela-3 (NATO: SA-14 Gremlin) infrared guided short range surface to air missiles.

Mine warfare

The Project 266 can detect floating and moored mines using its surface search radar and mine-locating sonar. Mines can be detected up to 150 m deep. This class has difficulties detecting bottom mines. Various types of sweeps are carried, including contact, magnetic and acoustic sweeps. Mines are destroyed by sweeps, depth charges or autocannon fire.

Users

The vast majority of the Project 266 entered Soviet services. Four ships were built to Project 266E export standard for an Egyptian contract. Two former Soviet ships were transferred to Vietnam.

Media


Details


Facts Project 266 Akvamarin class
General
Origin
Soviet Union
Type
Ocean going minesweeper
Complement
56, including 5 officers
Dimensions
Displacement
519 t standard
560 t full load
Length
52.1 m
Beam
9.4 m
Draft
2.65 m
Propulsion
Arrangement
Two diesel engines, one per shaft
Machinery
2x M-503B diesel engines
Power output
2.500 hp per engine
Propulsion
2 shafts, controllable pitch propellers
Mobility
Speed
16 knots
Range
1.500 nm at 12 knots
Autonomy
7 days
Sensors
Surface search radar
Rym-K
Fire control radar
1x MR-104 Rys (for AK-230M)
Navigation radar
Don
Sonar
MG-69 Lan mine-search sonar
Systems
Communications
MG-25 underwater communication system
IFF system
Nikhrom
Guns
CIWS
2x2 30mm AK-230M
SAM
Point defense
2x MTU-4 launcher for 4x 9K34 Strela-3 infrared guided missile
Underwater warfare
Depth charges
Up to 36 BGB depth charges
Minelaying
Up to 10 mines
Mine warfare
Sweeps
BKT contact sweep (or MT-1D or PST-1 or PPT-1)
TEM-2 magnetic sweep (from 1969 TEM-3)
PAUT sweep
AT-3 acoustic sweep
Mine diposal
2200 meters of ShZ-1M or ShZ-2 detonating cord

Subcomponents


30mm AK-230

Fitted with twin barrel 30mm AK-230M on the bow and rear. Both controlled by a single MR-104 Rys fire control radar.

25mm 2M-3

At least one of the two ships exported to Vietnam uses 25mm 2M-3M manned anti-aircraft guns.

9K34 Strela-3

One or two quadruple MTP-4 launchers for the 9K34 Strela-3 (NATO: SA-14 Gremlin) provide point air defense.