Low frequency active sonar

Thema:
LFAPSPRO

We have over 30 years of practical experience with low frequency active sonar (LFAS). This radar system provides protection against submarines (Anti-Submarine Warfare). Find out what we do for the Dutch Ministry of Defence using LFAS.

Initial research on experimental ALF system

We believe sonar research can only be successful through intensive experimentation at sea. For that reason, we conduct annual LFAS experiments at sea, working closely with the Dutch Defence Materiel Organisation.

We began research into the experimental ALF system in 1990. This was in collaboration with Thales Underwater Systems for the Dutch Ministry of Defence.

Testing with new type of LFAS system

We’re currently testing new concepts and algorithms at sea using the successor to the ALF system. This semi-operational Interim Removable LFAS system consists of the Socrates Sonar Source, which we developed. This system is also used by the Royal Netherlands Navy on board operational platforms to gain operational experience.

This new type of sonar brings new scientific challenges, which we’re keen to tackle through research. Our research topics are waveform design, array processing, false alarm reduction, wide-band sonar signal processing, and sonar performance prediction.

This research programme has led the Royal Netherlands Navy to purchase an operational LFAS (Multistatic Active Passive System) from Ultra Electronics Maritime Systems, with signal processing supplied by TNO.

Leaflet on Anechoic Basin

Find out how to take underwater measurements in our anechoic basin

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Military use of space

Informatietype:
Article

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Signature management

Informatietype:
Article

The safety of military platforms benefits from the latest possible detection. TNO has more than 50 years of experience in the field of ship acoustics.

Surface warfare

Informatietype:
Article

TNO stands at the forefront of innovation in both technology and technique for optimisation of wind and tidal energy to the deepest deep-sea mining.

Test to detect drowning people

Informatietype:
News
9 June 2021
Yesterday, off the coast of Scheveningen, a drone was tested for the detection of drowning people. The unmanned aerial vehicle can function as an extra pair of eyes during rescue operations, thereby enhancing their success rate. Drones could also be used for surveillance on water.