OVERVIEW: The SET-65K is a heavyweight, ship-launched, electric anti-submarine torpedo developed by Russia. It is an upgraded version of the original SET-65, optimized for modern surface combatants with improved guidance and performance.

DETAILS: "SET" stands for "Samonavodyashchayasya Elektrotorpeda" (self-guided electric torpedo), and "65K" indicates a modernized model derived from the 1965-design baseline. The SET-65K was introduced to extend the service life of older SET-65 series torpedoes with enhanced sonar systems, improved propulsion, and better reliability in modern ASW environments. It retains the 533 mm caliber and electric drive powered by a silver-zinc battery, and uses an upgraded active/passive acoustic seeker. The system was re-certified and integrated into updated Russian surface combatants after modernization programs post-2000.

The SET-65K specifically introduced more resistant homing electronics, enhanced onboard processing, and better counter-countermeasure capabilities. These upgrades were part of a broader Russian naval program to extend and upgrade legacy underwater weapons for both domestic use and potential export.

TYPE: Heavyweight Anti-Submarine Guided Torpedo

FUNCTION: The SET-65K is launched from 533 mm ship-based torpedo tubes and acquires targets using an improved acoustic seeker operating in both active and passive modes. It is designed to engage enemy submarines in various environments, including shallow, noisy, or thermally layered waters.

NOTE:
IOC: 1965 (SET-65), 2008 (SET-65K)
Manufacturer: Russia (Gidropribor)
Operators: Russia
Platforms: Udaloy-class destroyer (modernized units), Admiral Levchenko
Conflict used in: None confirmed

SOURCE:
Jane’s Naval Weapon Systems ; Russian Ministry of Defence publications ; Military-Today: https://www.military-today.com/navy/set_65.htm ; GlobalSecurity.org: https://www.globalsecurity.org/military/world/russia/set-65.htm ; Wikipedia: https://en.wikipedia.org/wiki/SET-65_torpedo