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C-Guard Naval Decoy System

Terma's C-Guard decoy launching system is made to defeat stream attack with multiple missiles and torpedoes from multiple directions.

C-Guard naval decoy system

Terma's C-Guard decoy launching system is made to defeat stream attack with multiple missiles and torpedoes from multiple directions.

The system will effectively counter advanced threats like small range gate Radio Frequency (RF) missiles, imaging Infra Red (IR) seekers missiles, and advanced next generation torpedoes. These threats require fast response and utilization of advanced tactics supporting the latest in decoy technologies available. 

With more than 150 systems in operation worldwide, C-Guard has proven to be a cost-effective solution with a high degree of operational time.   

See our C-Guard video below which has been produced in cooperation with the Royal Danish Navy:

6 tube launcher - Image courtesy: Royal Danish Navy

C-Guard Naval Decoy System

C-Guard offers full protection against above and below water threats.  C-Guard supports the latest generation of decoys including sub-munition based designs and active decoys. Also, the latest generations of Anti-Torpedo decoys are supported vastly, improving the fight against modern torpedoes.  


Multi-threat engagements.C-Guard processes a unique high number of threats when compared to other available decoy launchers. The system maintains a threat list and calculates a firing solution for up to 4 threats at a time. After launching decoys to counter these threats, the system calculates other firing solutions to counter additional threats.

Multi-azimuth launchers. The fixed launcher design with 6 or 12 tubes in 3 or 4 directions on each side will provide effective 360° protection without risk of a mechanical failure in moving parts and high maintenance costs.

Advanced algorithm.  The advantages of multi azimuth launchers and powerful decoys are exploited to the maximum effect by the highly advanced algorithm. The algorithm uses a classified customer owned database and can be modified by the Navy to accommodate new threats and tactics that may appear in the future. In combination with the right decoys, the algorithm ensures that decoys are placed to counter any threat including the newest missiles with small range gates.

Blue Force protection. The system's algorithm is prepared for the protection of friendly or neutral vessels, thereby assuring that own ship's threat avoidance will not place other units inside the missiles' field of regard and range gates. Less advanced systems do not include own or neutral ships into the firing solution.

Cost effectiveness. C-Guard is an intelligent and state-of-the-art naval decoy system. Based on the 130 mm NATO standard, Terma has 150+ systems in operation worldwide. The system is easy to install and offers simple and effective training and maintenance procedures. Furthermore, it offers a small footprint, Low Total Cost of Ownership (TOC) and High Mean Time Between Failure (MTBF). This results in a cost-effective solution with a high degree of operational time. 

DT-12T launcher - with Danish Royal Ship, the "DANNEBROG", in the background

C-Guard Naval Decoy System

System Integration
The system can be fully integrated with any Combat Management System (CMS). A fully expanded configuration could look as indicated below. 

system integration









DL-6T Launcher
The DL-6T launchers are fitted with 6 tubes, 2 in each of the firing angles 20°, 40°, and 135° (port and starboard side) in the azimuth plane in relation to the sailing direction. The firing angles have been selected using extensive modeling simulations by the Danish Defence Research Establishment. The tubes are elevated at 45° enabling firing of both mortar or rocket propelled decoy types. Despite the fact that most decoys are mortar launched, deck reinforcement will usually not be required due to the force distributing base plate.

DL-12T Launcher
The DL-12T launchers are fitted with 12 tubes, 3 in each of the firing angles 10°, 40°, 60°and 135° in the azimuth plane in relation to the sailing direction. Both the DL-6T and the DL-12T launcher tubes are fitted with a Round Identification System (RIS).

Control Unit
The Control Unit (CU) is located in the CIC (optionally two additional units can be installed e.g. one on the bridge). It is intended for local operation and to provide a graceful degradation in case the CMS or Launch Control Computer (LCC) fails.

The C-Guard Control Unit has 3 switches and a large touch sensitive display. The display is designed for use at night (and in CIC) as well as for daylight use on the bridge.

Launch Control Computer
The Launch Control Computer (LCC) is a workstation computer with advanced engagement algorithms. The algorithms are used for calculating the optimum proposal for firing decoys. The LCC is interfaced to the LIU and the CMS for controlling launch of the decoys and monitoring the tube content and system status e.g. launcher safety switch. As an alternative, a direct interface with the ESM and the ship services allows stand-alone operation controlled through the CU.

Launcher Interface Unit
The Launcher Interface Unit (LIU) is an intelligent power supply that controls the firing pulses and communicates with the Control Unit(s) and the LCC. The LIU is connected to primary and secondary power such that SKWS can continue operation in power failure situations. The LIU is prepared for support of the SIREN Active Offboard Decoy that requires extra power supplies and computer capacity.

Round Identification System (RIS)
In order to provide correct loading information to the SKWS operators, a Round Identification System (RIS) is fitted so that the content of each tube is shown to operators of the CU or CMS. This avoids completely the delay in communicating the tube content and potential misunderstandings between loaders on deck and operators in CIC or on the bridge. The RIS is based on a tag that is fitted on the decoy barrel extender, either by the Navy or by the decoy manufacturer. The system works with all available decoys.