Defender and Deceptor are reactive torpedo countermeasures that can be launched from submarine or surface ship, and provide the user with maximum flexibility in the form of programmable motion plans, acoustic plans and user-defined threat tables.

The Defender is a vertically mobile countermeasure that defeats the torpedo by detecting, classifying and reacting intelligently. 

The Deceptor countermeasure can swim, thus providing horizontal separation from the ship which is critical in shallow water and lures the torpedo away from its target. 

The ADC (Acoustic Device Countermeasure) MK3 and MK4 are 6.25-inch (16 cm) diameter by 108 inch long torpedo and sonar countermeasures externally stored and launched from all USN submarines including all USN SSNs, SSBNs and SSGNs. As the original developer and sole producer of the ADC MK4, Ocean Systems has provided the fleet this critical capability since 1987.

The ADC (Acoustic Device Countermeasure) MK 2 is a 3-inch diameter, expendable countermeasure device designed for launch from surface ships and submarines to counter torpedo threats. The ADC MK2 hovers vertically at a pre-selected depth, emitting an acoustic signal. The vertical depth is set prior to launch and maintained by a pressure-controlled motor driving a small, shrouded propeller in the tail of the decoy. Power for the motor and electronics is provided by a thermal battery. In the electronics section mounted below the acoustic projector section the signals are generated and amplified, while the uppermost acoustic projector section consists of ceramic transducers and impedance-matching networks. Variants include the MOD1, MOD3 and MOD4. Ocean Systems is the only manufacturer of these ADC MK2 variants for the USN and Foreign Military Sales (FMS).

The SCAD 101 (Submarine Countermeasure Acoustic Device) is self-contained externally mounted and launched torpedo countermeasure fitted to UK Vanguard and planned for Astute class submarines. The SCAD 101 Countermeasure has acoustic multi-mode capability and is completely programmable by the user. Communications with the store including mission programming is available up until the device is launched. Once launched the countermeasure executes its mission and then scuttles to the ocean bottom.

The 100mm diameter x 1000mm long SCAD 102 is the internally launched equivalent to the SCAD 101. It is compatible with all submarines equipped with a 100mm signal ejector. The SCAD 102 is currently fitted to all UK submarines.

LESCUT (Launched Expendable Scutter) is a product between Ocean Systems and RAFAEL, Israel. LESCUT is a rocket, mortar or over-the-side launched, expendable torpedo decoy based on Ultra’s proven REAM and LEAD technology as well as RAFAEL’s proven SCUTTER electronics and software.

LESCUT can be launched from a long list of standard chaff launchers found throughout the world. The various launch combinations enable decoy range from 2000 meters to close aboard. The LESCUT decoy operation is initiated automatically after water impact. Active acoustic transmissions are detected and analyzed resulting in the decoy selecting and generating the appropriate deception signal for transmission, including Doppler effects, target highlights and target self-noise. If no torpedo transmissions are detected, LESCUT incorporates generic responses which are transmitted to counter passive homing torpedoes. The decoy’s “threat library” can be customized for each user’s particular requirements. At the end of life all software is erased and the decoy sinks.

This information is approved for public release in accordance with 22 CFR 125.4(b) (13)

SUBSCUT (Submarine Scutter) is a joint product between Ultra Electronics Ocean Systems and RAFAEL, Israel. A submarine launched reactive decoy, SUBSCUT is designed to respond to two different types of torpedo simultaneously, whether they are active, passive, or passive homing.

On receipt of a torpedo alert on board the submarine, SUBSCUT may be launched from any submarine signal ejector or from an external launcher. The decoy is initiated automatically after launch, propelling itself to a preset depth between 10 and 300 meters, where it hovers and listens for the torpedo transmissions. Active acoustic transmissions are detected and analyzed resulting in decoy selectivity and generation of the appropriate deception signal for transmission including Doppler effects, target highlights and target self-noise. If no torpedo transmissions are detected, SUBSCUT incorporates generic responses, which are transmitted to counter passive homing torpedoes. The decoy’s “threat library” can be customized for each user’s particular requirements. At the end of life the decoy sinks, and all software is erased.

This information is approved for public release in accordance with 22 CFR 125.4(b) (13)

The NAE (Naval Acoustic Electromechanical) Beacon MK3 is a submarine or surface ship-launched underwater expendable countermeasure device designed to counter torpedo threats. The NAE Beacon performs its pre-selected mission while suspended from a float and tether at a pre-selected depth. Power for the motor and electronics is provided by a thermal battery. Variants include the MOD2 and MOD3. Ultra Electronics Ocean Systems manufactures the NAE Beacon MK3 MOD3 for the USN and Foreign Military Sales (FMS).

Ultra’s TWS is a key element of Surface Ship Torpedo Defense (SSTD). This detection, alert and tactical control system provides the capability necessary for the ship to evade, decoy, or defeat the torpedo using existing or future tactics and countermeasures. As an urgent Chief of Naval Operations (CNO) priority for rapid fleet deployment, the original FY17 Initial Operational Capability (IOC) program of record was augmented by an accelerated effort to deliver up to seven Engineering Development Model (EDM) systems to NIMITZ Class carriers for IOC in FY14. In FY12, CNO directed a hybrid prototype system to be delivered to CVN-77 in FY13 and it is currently deployed. While the referenced contract is for seven delivered arrays, the full program of record is for a total of 51 arrays.

The TWS program included the development of a towed array active and passive sensor system and a complete signal processing, automation, and tactical control system that support deployment of the ATT hard-kill torpedo countermeasure. Ultra is the prime contractor for the development of the Torpedo Warning System Receive Array (TWSRA), the Towed Active Acoustic Source (TAAS), as well as a shipboard array power system, telemetry receiver, processing hardware, and tactical software. The TWSRA was successfully tested at Lake Pend Oreille in FY12 with no critical array failures. The prototype TWSRA was also tested at sea on a DDG-51 Class tow ship in June 2012. During this two week at sea test period, the system demonstrated 100% availability with no telemetry, hydrophone, or mechanical failures. To date, TWS has exhibited near 100% availability on several deployments, contractor test events and Quality Reliability Assurance (QRA) testing.