Vishnya-class intelligence ship

These ships are large, purpose built ships designed for signals intelligence gathering via an extensive array of sensors.[4] The data could be transmitted to shore via satellite link antennas housed in two large radomes. The ships are armed with two AK-630 close-in weapon systems and SA-N-8 surface-to-air missile (SAM) launchers, for last resort self-defense.

Vasily Tatishchev was deployed to the Eastern Mediterranean Sea on 5 October 2015 to monitor the conflict in Syria.[5]

On February 15, 2017, CNN reported that SSV Viktor Leonov, a Russian spy ship was sitting 30 miles (48 km) off the coast of Connecticut. This is the farthest north the Russian spy vessel has ever ventured, according to US defense officials. CNN later reported that Viktor Leonov, which conducted similar patrols in 2014 and 2015, was off the coast of Delaware, but typically she only travels as far north as Virginia. The ship is based with Russia's Northern Fleet but had stopped over in Cuba before conducting her patrol along the Atlantic Coast and is expected to return there following her latest mission. She was spotted operating off the coast of South Carolina and Georgia in December 2019. The United States Coast Guard at the time published a MSIB alleging unsafe operations being performed in that area, including running without navigation lights, and failing to respond to hails. The ship is outfitted with a variety of high-tech interception equipment and is designed to intercept signals intelligence. The official said that the US Navy was "keeping a close eye on it.".[6]

• List of ships of the Soviet Navy
• List of ships of Russia by project number

• All Vishnya class intelligence ships - Complete Ship List