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Tatarstan (Кедров) was a Project 11351 Nerey-class frigate (NATO reporting name Krivak III) of the Soviet Border Troops and later the Coast Guard of the Federal Security Service of Russia.

Design and description
Tatarstan was one of nine Project 11351 ships launched between 1982 and 1992. Project 11351, the Nerey (Нерей, "Nereus") class, was the patrol version of the Project 1135 Burevestnik for the Soviet Maritime Border Troops. The ships were designated Border Guard Ship (Пограничный Сторожевой Корабль, PSKR) to reflect their role as patrol ships of the Border Troops. In comparison to other members of the class, Project 11351 ships has a helipad and hangar for a Kamov Ka-27PS search-and-rescue helicopter astern, in exchange to losing one 100 mm gun, one twin-arm surface-to-air missile launcher and the URPK-5 Rastrub (SS-N-14 'Silex') anti-ship missile launchers. NATO classified the vessels as 'Krivak III'-class frigates.

Tatarstan was 123 m long overall, with a beam of 14.2 m and a draught of 5 m. Displacing 3180 t standard and 3670 t full load, the ship's power were provided by two 22500 shp DT59 and two 9000 shp DS71 gas turbines arranged in a COGAG installation, driving two fixed-pitch propellers. Design speed was 32 kn and range 3900 nmi at 14 kn. The ship's complement was 192, including 31 officers.

Armament and sensors
Tatarstan was armed with one 100 mm AK-100 gun mounted forward of the bridge and two AK-630M close-in weapon system autocannons mounted on each side of the helicopter hangar. Defence against aircraft was provided by twenty 4K33 OSA-M (SA-N-4 'Gecko') surface-to-air missiles which were launched from one set of twin-arm ZIF-122 launchers, mounted aft of the fore 100 mm gun. For anti-submarine warfare, the ship were equipped with a pair of RBU-6000 213 mm Smerch-2 12-barrel anti-submarine rocket launchers and a pair of PTA-53-1135 quadruple launchers for 533 mm torpedoes, consisted of either 53-65K wake homing torpedo or SET-65 anti-submarine homing torpedo. The ship can also carry 16 naval mines.

The ship sensor suites includes Sapfir-U7 combat management system, a single MR-760 Fregat-MA air/surface search radar, one Vaigach-Nayada navigation radar, and the MP-401 Start Electronic Support Measures (ESM) system. Fire control for the guns consisted of MR-184 Lev radar for the 100 mm gun and Vympel-A radar for the 30 mm autocannons. An extensive sonar complex was fitted, including the bow-mounted MGK-335S Platina-S and the towed-array MG-345 Bronza. The vessel was also equipped with two PK-16 and two PK-10 decoy-dispenser system which used chaff as a form of missile defense.

Construction and career
The frigate was the sixth ship of the class. The keel was laid on 4 April 1988 with yard number 206 at the Zaliv Shipyard in Kerch. The ship was launched on 30 April 1989. Tatarstan was commissioned to KGB Border Troops Naval Service on 	28 December 1989.

The ship was assigned to the 2nd Brigade of Border Guard Ships, 1st Red Banner Division of Border Guard Ships in Petropavlovsk-Kamchatsky, part of the Northeastern Border District. From 27 September to 20 November 1990, Tatarstan sailed from Sevastopol to its assigned homeport in Petropavlovsk-Kamchatsky via Suez Canal.

Tatarstan carried the remains of Vitus Bering, leader of the Second Kamchatka Expedition, and five crew members of the St. Peter in 1992 for reburial in Nikolskoye, Bering Island.

She was decommissioned on 24 April 2002. Kedrov was stricken from the coast guard on 28 February 2003 and was sent to China for scrapping, although according to Jane's Fighting Ships 2015-2016, the ship was extant and non-operational as of 2015.