Skip to main content

Helicopter Long-Range Active Sonar

Features

  • Highest-performance dipping sonar in the world — demonstrated against both diesel-electric and nuclear submarines, the HELRAS outperforms in diverse geographic and acoustic environments, and in both active and passive operations.
  • Demonstrated performance advantage over medium-frequency (2 kHz and higher) dipping sonar systems — by operating at a nominal frequency of 1.38 kHz, the HELRAS consistently achieves long- range detections and target tracking in both littoral and open ocean environments.
  • Lightweight system produces high source levels, narrow vertical transmit beams and high array gain, performing at least 14 dB higher than that of medium frequency dipping sonar systems.
  • Patented, compact, powerful acoustic transducers and expandable transmitting and receiving arrays produce a lightweight system that exploits the advantages associated with using truly low acoustic frequencies.
  • High-resolution Doppler processing — long-shaped CW pulses (up to 10 seconds) and wide-bandwidth FM pulses (up to 5 seconds) are available to detect near-zero Doppler low strength targets.
  • Interoperable with all key sonobuoys and modern low-frequency towed variable depth sonars.
  • Yields savings in operating costs — long-range detection and large area search rates reduce total operating hours.

Resources

  • L3Harris Ship Reference Guide 2021

    L3Harris Ship Reference Guide

  • HELRAS Data Sheet

    HELRAS Data Sheet

Featured News

Data represented with blue lights

Press release | 05. 29. 2025

L3Harris Receives Contract to Develop Next-Generation Security Processor for US Government

L3Harris Technologies has been awarded a contract by the U.S. government to develop a next-generation security processor to secure communication devices across the globe.

Data represented with blue lights

Press release | 05. 29. 2025

L3Harris Receives Contract to Develop Next-Generation Security Processor for US Government

Celebrating 190 years in Italy’s Naval Industry: From a Family-Owned Business to a Global Company

Editorial | 04. 14. 2025

Celebrating 190 Years of Excellence: L3Harris Calzoni's Legacy in Italy’s Naval Industry

Adrian Kemps, L3Harris’ Corporate Vice President and Country Executive for Saudi Arabia, and Alastair J. Bisset, General Manager of Zamil Shipyards, sign the MOU.

Press release | 04. 08. 2025

L3Harris and SAMI Joint Venture Sign Agreement with Zamil Shipyards to Advance Autonomous Maritime Capabilities in the Kingdom of Saudi Arabia

The L3Harris Iver4 580 for UK Royal Navy Project Wilton

Editorial | 01. 28. 2025

L3Harris’ Iver4 580: Supporting the Royal Navy’s Project Wilton

Sailor aboard USS DELAWARE turns an Iver4-900 AUV around for storage outside the torpedo room

Editorial | 11. 12. 2024

A Major Milestone in Unmanned Systems Technology: The Delivery of Lithium-ion Batteries for Submarine Use

Related Domains & Industries

Solutions that solve our customers' toughest challenges.
view all capabilities
SEAPORTe Contract Description