The Pauk class is the NATO reporting name

NATO reporting name

NATO reporting names are classified code names for military equipment of the Eastern Bloc...

 for a class of small patrol corvette

Corvette

A corvette is a small, maneuverable, lightly armed warship, originally smaller than a frigate and larger than a coastal patrol craft or fast attack craft , although many recent designs resemble frigates in size and role...

s built for the Soviet Navy

Soviet Navy

The Soviet Navy was the naval arm of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy would have played an instrumental role in a Warsaw Pact war with NATO, where it would have attempted to prevent naval convoys from bringing reinforcements across the Atlantic Ocean...

 and export customers between 1977 and 1989. The Russian designation is Project 1241.2 Molniya-2. These ships are designed for coastal patrol and inshore anti-submarine warfare. The design is the patrol version of the Tarantul class corvette

Tarantul class corvette

The Project 1241.1 Molniya are a class of Soviet missile corvettes. They have the NATO reporting name Tarantul...

 which is designated Project 1241.1 by the Russians, but is slightly longer and has diesel engines. The Ships are fitted with a dipping sonar which is also used in Soviet helicopters.

Soviet Navy

Soviet Navy

The Soviet Navy was the naval arm of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy would have played an instrumental role in a Warsaw Pact war with NATO, where it would have attempted to prevent naval convoys from bringing reinforcements across the Atlantic Ocean...

45 boats were built for the Soviets, of which 18 remain in Russian Navy service (including those operated by the Maritime border guard). Four ships are operated by the Ukrainian Navy

Ukrainian Navy

The Ukrainian Naval Forces is the navy of Ukraine and part of the Armed Forces of Ukraine. It was established in 1992. It consists of 5 branches: surface forces, submarine forces, Navy aviation, coast rocket-artillery and marines...

 or Ukrainian Coast Guard (sources vary)

Bulgarian Navy

Bulgarian Navy

The Bulgarian Navy is the navy of Republic of Bulgaria and forms part of the Bulgarian Armed Forces. It has been largely overlooked in the reforms that Bulgaria had to go through in order to comply with NATO standards, mostly because of the great expense involved and the fact that naval assaults...

Two ships transferred in 1989/90 - Bodri (Brisk) and Reshitelni (Decisive)

Indian Navy

Indian Navy

The Indian Navy is the naval branch of the armed forces of India. The President of India serves as the Commander-in-Chief of the Navy. The Chief of Naval Staff , usually a four-star officer in the rank of Admiral, commands the Navy...

Four ships transferred in the late 1980s and are known as the Abhay class

Abhay class corvette

The Abhay class corvettes of the Indian Navy are customized variants of the Soviet Pauk class corvettes. The class is primarily intended for coastal patrol and anti-submarine warfare.Four vessels of the class currently serve in the Indian Navy....

. A plan to license-produce more units in India was abandoned in favor of the indigenous Kamorta class. Ships named
INS Abhay (Fearless)
INS Ajay (Unconquerable)
INS Akshay (Indestructible)
INS Agray (Aggressive)

Ukrainian Navy

Ukrainian Navy

The Ukrainian Naval Forces is the navy of Ukraine and part of the Armed Forces of Ukraine. It was established in 1992. It consists of 5 branches: surface forces, submarine forces, Navy aviation, coast rocket-artillery and marines...

Two ships transferred, the U207 Uzghorod (now decommissioned) and the U208 Khmelnytskyi (in service).