The Varshavyanka-Class submarines, also known as the Project 877 Paltus, are a series of diesel-electric submarines developed by the Soviet Union in the 1970s. Designed for anti-submarine warfare, they are known for their quiet operation and advanced sonar systems, making them effective in coastal defense and surveillance missions. These submarines are equipped with a variety of weapons, including torpedoes and anti-ship missiles. The Varshavyanka-Class has been widely exported and is used by several navies around the world, contributing to its reputation as a reliable and versatile platform in modern naval warfare.