The Boeing AGM/RGM-84Harpoon and the Tactical Missiles Corporation Kh-35 are subsonic, sea-skimming anti-ship cruise missiles occupying the same tactical weight class. The Harpoon entered service in 1977 as a fleet-wide standard for the United States and NATO. The Kh-35, frequently designated the "Harpoonski" by Western analysts, was delayed by seeker issues and post-Soviet funding shortfalls, reaching the Russian Navy in 2003. Both systems currently compete in the export market, defining the anti-surface warfare (ASuW) architecture of their respective operator networks.
Development and Design
The Harpoon was built around a 667 kg airframe to provide a modular weapon for air, surface, and subsurface launch. Its turbojet propulsion and 227 kg warhead were specified to neutralize Soviet destroyers and cruisers. The Kh-35, weighing 657 kg, was developed to equip smaller fast attack craft and corvettes. The Russian missile uses a turbofan engine and carries a lighter 145 kg warhead, relying on a penetrating shaped-charge and fragmentation effect to compensate for the reduced explosive mass.
Performance and Capabilities
Base models of both missiles offer similar kinematics: subsonic speeds of Mach 0.7 to 0.8 and baseline ranges of 120-130 km. Modernized variants push these envelopes further. Boeing’s Harpoon Block II+ ER extends range beyond 240 km, while the Russian Kh-35U reaches 260 km. The Kh-35 cruises at 10-15 meters before dropping to 4 meters in its terminal phase. The Harpoon executes a comparable sea-skimming profile but incorporates a terminal pop-up maneuver in specific variants to bypass older close-in weapon systems (CIWS), though this profile exposes the missile to modern phased-array tracking.
Guidance and Technology
Both weapons utilize inertial navigation systems (INS) mid-course and active radar homing for terminal acquisition. Harpoon Block II integrated GPS, granting littoral and land-attack capability. The Kh-35U matches this via GLONASS integration. The ARGS-35E X-band seeker on the Kh-35 targets vessels up to 5,000 tonnes. The Harpoon’s seeker integrates decades of continuous software updates, specifically improving its electronic counter-countermeasures (ECCM) against modern naval jamming systems.
Deployment and Combat Record
The Harpoon engaged and sank Iranian naval vessels during Operation Praying Mantis (1988) and Libyan ships in the Gulf of Sidra. Recently, shore-launched Harpoons supplied by Denmark forced the Russian Black Sea Fleet to operate further from the Ukrainian coast. The Kh-35 has seen heavy use in the Russo-Ukrainian War. Russian forces employ it for coastal and inland strikes, though Ukrainian intercept data indicates vulnerability to modern air defenses. Ukraine’s domestic Kh-35 derivative, the R-360 Neptune, sank the Russian cruiser Moskva in 2022, proving the airframe's viability against capital ships.
Conclusion
The Harpoon holds the advantage in complex electronic warfare environments and heavy strike roles. Its 227 kg warhead delivers 56% more explosive mass than the Kh-35, causing higher structural damage to targets above 5,000 tonnes. Decades of US Navy ECCM testing give it a higher probability of penetration against layered air defenses.
The Kh-35 has the edge in low-cost, distributed integration. Its design parameters allow operators to mount anti-ship ordnance on light patrol boats and helicopters (Ka-52). It is the optimal system for navies prioritizing high-volume, decentralized coastal defense over blue-water power projection.