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Activity title

EO and IR-Countermeasures against Anti-ship Missiles

Activity Reference



Systems Concepts and Integration

Security Classification



Awaiting Publication

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End date



Antiship missile, Countermeasure, Decoy, Electro-optical, Flare, Infrared, Laser, Modeling, Visible


The defense against anti ship missiles is difficult. In general a layered defense is used after the missile is detected at long distance. The outer layer will typically use interception missiles while the final active defense is taken care of by a close-in-weapon-system (CIWS). The layer in between involves the use of soft-kill, either active ECM or passive decoys (chaff and decoys against respectively RF and IR guidance systems). In some cases soft-kill is the preferred option for ship self defense. For optimum deployment of these decoys, timing and positioning is critical. With the advent of IR and visible band imaging seekers this has become even worse because the fact that these type of seekers can distinguish between the target ship and potential countermeasure decoys. Therefore, tools for the evaluation of the effectiveness of decoy deployment strategies are required. Anti ship seeker simulators for the evaluation of RF decoy countermeasures already exist, facilities for the evaluation of infrared countermeasure deployment strategies for ships, however, are lacking. At their Fall 2008 meeting, AC/141 MCG8 on Electronic Warfare recommended the RTA/SCI Panel to set up a Task Group to investigate the development of countermeasure evaluation tools for future use in MCG/8 Trials. In the long term this can also provide inputs for future updates of the NASMDEF package with an IR capability.


The main purpose of the proposed Task Group will be to analyze the effectiveness of different IR and visible imaging and non imaging anti-ship missile seeker algorithms against existing and future passive and active countermeasures. Symmetric and asymmetric threats will be analyzed. Deficits in countermeasure possibilities against such threats will be studied and reported. This groups results should identify common simulation and analytical methods. The activities of the Task Group will result in a final report on the options for countermeasures and countermeasure concepts against IR and visible band Anti-Ship Missiles. This will include: -A listing of national simulation tools and their availability to participating Nations -Summary of the results of the simulation studies -Recommendations of future toolsets for countermeasure evaluation based on available sets. -Results of conducted surveys Deliver technical recommendations on visible band and infrared guided ASMD issues to NATO groups in particular MCG/8. Present proposals for contributions to yearly MCG/8 trials including resources.


Generate overviews of existing types of threats, algorithms, countermeasures, simulation tools, assessment criteria and common scenarios for IR imaging seekers. Define interfaces between the output of the scenario generation, raw data of measured scenarios and computer environment in order to establish a common data set. Define interfaces for generic seeker algorithms in order to exchange and incorporate into other member nations simulations Run national simulation tools on the common scenarios with national and/or exchanged seeker algorithms. Present and compare the results. Generate Survey of asymmetric, visible band anti-ship missiles seekers and advanced countermeasures. Generate parameters and requirements for future IR and/or visible seeker simulation tool(s) Summary of results in a final report

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