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Interceptigon Drones by Greece’s Delian Signal Shift Toward Autonomous Coastal Defense at DEFEA 2025.
During the 2025 edition of the DEFEA exhibition, held from May 6 to 9 at the Metropolitan Expo in Athens, the Greek company Delian Alliance Industries introduces for the first time its Interceptigon series, a new concept of autonomous one-way effector (OWE) platforms designed for defensive saturation operations. The system includes two specialized devices, Interceptigon A and Interceptigon N, engineered to conduct coordinated strikes in coastal, land-based, or maritime environments by leveraging stealth, autonomy, and a low operational signature. Developed in response to the evolving demands of asymmetric warfare, these attritable effectors are intended to provide European and allied nations with a credible strategic option within anti-access/area denial (A2/AD) doctrines.
Interceptigon N is a stealthy unmanned surface vessel (USV) designed for seabed deployment. It remains hidden from radar and infrared sensors until activation (Picture source: Army Recognition)
Interceptigon A is a fixed-wing aerial drone optimized for terrain camouflage and designed to remain concealed until activation. Embedded in the landscape, it can be hidden on hillsides, ridgelines, or along the edges of rural and semi-urban zones. Once activated, it executes high-speed swarm attacks targeting ground, surface, or even airborne threats. With a cruising speed of 100 km/h and an operational range of 40 kilometers, it is suitable for short-range strikes that rely on speed and the element of surprise. Its payload capacity is 371 grams, sufficient to damage or neutralize lightly protected assets such as mobile radar units, antennas, logistical vehicles, or exposed infrastructure. Interceptigon A features the proprietary OSIRIS navigation module developed by Delian, enabling it to operate in GPS-denied environments. This system combines visual mapping and odometry to ensure navigation accuracy with a margin of error below 0.1%, even in heavily contested electromagnetic environments.
Interceptigon N is a stealthy unmanned surface vessel (USV) designed for seabed deployment. It remains hidden from radar and infrared sensors until activation. It is intended for use during sensitive phases such as enemy amphibious landings or vessel transits through littoral zones, chokepoints, or port approaches. It cruises at 80 km/h, has a 30-kilometer range, and carries a 70-kilogram kinetic payload, making it capable of targeting larger maritime assets such as landing craft, patrol boats, or high-speed vessels. Its low-profile design and ability to operate near or slightly below the waterline reduce the risk of early detection.
Both platforms can be deployed independently or in tandem as a coordinated swarm system, allowing them to saturate adversary defenses. This model is based on mass deployment, with each unit designed to be low-cost, expendable, and mass-producible. The operational concept relies on rapid activation from a basic target description, with autonomous navigation to the point of engagement. This architecture supports distributed and unpredictable strikes, well-suited to dynamic or geographically constrained environments.
The Interceptigon series is intended for use in frontline and island-based theaters where operational margins are limited. Identified areas of interest include the Baltic states, Scandinavia, Southeast Asia, and the Aegean region, locations where dense threat environments, geographical constraints, and proximity to rivals require resilient, quickly deployable defensive solutions. Delian highlights that high-value, sophisticated platforms such as frigates or mobile air defense systems are increasingly vulnerable to coordinated attacks by inexpensive drones, as demonstrated in recent conflicts including the war in Ukraine. In this context, Interceptigon offers an alternative centered on distributing a large number of autonomous effectors to achieve localized saturation.
Delian Alliance Industries plans to integrate the Interceptigon platforms into broader A2/AD networks, already partially operational, through its coastal surveillance towers, portable sensor fusion modules, and real-time tactical analysis software. The company’s aim is to establish a sensor-effector mosaic connected by a unified digital architecture, capable of operating at machine speed and ensuring continuous coverage of territorial and exclusive economic zones.
Delian Alliance Industries positions itself as a defense technology firm focused on autonomous conflict environments. With offices in Athens and London, the company is supported by European venture capital funds and already works with several end users on the European Union’s external borders. Launching the Interceptigon series marks a significant milestone in Delian’s progression toward becoming an emerging defense integrator in the autonomous systems sector. If adopted internationally, particularly by island or geographically constrained states, the Interceptigon platforms could contribute to a broader proliferation of attritable and autonomous offensive systems tailored to the characteristics of contemporary asymmetric conflicts.
Interceptigon A is a fixed-wing aerial drone optimized for terrain camouflage and designed to remain concealed until activation (Picture source: Army Recognition)