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Model 980 Active Low-Frequency Towed Sonar

Detection and tracking are provided for both active and passive operations

ALOFTS combines a high-powered, active source in a variable-depth towed body. A directional towed array receives active and passive signals. This combination allows high levels of acoustic energy to be transmitted by the active source in broad transmit beams. These beams are received by the narrow, highly-directional, noise-rejecting receive beams of the towed array.

L3Harris Towed Sonar Performs in Littoral, Shallow Water EnvironmentsĀ 

The towing and handling system combines the active source and passive towed array to achieve a single ā€œshort scopeā€ tow. This provides rapid response to ship maneuvers and is effective in the littoral, shallow water environment where other towed arrays are ineffective. System features include automatic depth keeping, automatic bottom avoidance and depth control from the sonar operator’s console.

L3Harris also offers shore-based sonar training.

  • Open systems architecture
  • Single tow active and passive sonar detects, classifies and localizes below layer threats
  • Torpedo defense and optional countermeasures
  • Intuitive user interface
  • High speed towing
  • Configurable for small and large ships
  • Port/Starboard ambiguity resolution
  • Full azimuth coverage in broadband and narrowband
  • High speed tow: 22 knots operational, 30 knots survivableĀ 
  • Directional transmissionĀ 
  • Embedded high fidelity trainerĀ 
  • Automatic depth keepingĀ 
  • Automatic bottom avoidanceĀ 
  • Short scope towĀ 
  • Small/large ship configurable - 1⁄2 the weight of comparable systemsĀ 
  • Simultaneous active and passive operationĀ 
  • Simultaneous CW and FM processingĀ 
  • Proven tow bodyĀ 
  • High capacity recording systemĀ 
  • Port/starboard ambiguity resolutionĀ 
  • Multitarget trackingĀ 
  • Open systems architectureĀ 
  • Torpedo detectionĀ 
  • Embedded XBT/Performance Prediction systemĀ 
    Ā 
  • Active 360° searchĀ 
  • Active sector searchĀ 
  • Active classification (3-D display)Ā 
  • Tactical geographic displayĀ 
  • Built-in test reportingĀ 
  • Performance predictionĀ 
  • Passive classification (DEMON)Ā 
  • Passive broadband search and trackĀ 
  • Long-range detectionĀ 
  • Left/right ambiguity resolutionĀ 
  • Reverberation reductionĀ 
  • Flow noise minimization at high speedĀ 

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