Project 61M (Kashin)

Project 61 Kashin was an important Soviet large anti-submarine ship design, and Project 61M/modified variants added weapons and systems to extend usefulness. The class belongs to the missile-era transition when surface combatants were moving from gun-dominated escorts toward missile and helicopter-supported ASW ships. Modified Kashin designs also served export customers, including India.

Kashin Mod ships combined gas-turbine propulsion, SA-N-1 air-defense missiles, guns, torpedoes, ASW rockets and added anti-ship missile capability in modified fits. The class was historically notable for gas-turbine propulsion in a large combatant. Modernization added punch but could not fully overcome age, limited missile capacity and older sensor architecture compared with later destroyers and frigates.

In operational use, Kashin Mod ships performed escort, ASW, patrol and presence missions. Exported or modified ships provided allied navies with credible destroyer-sized combatants, though maintenance and modernization requirements were significant. The class should be viewed as a Cold War ASW destroyer lineage with meaningful export life and a long tail of service in modified forms.