Low frequency active sonar

Initial research into an experimental ALF system

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

We are initiating research into the experimental ALF system in 1990, in collaboration with Thales Underwater Systems for the Ministry of Defence in the Netherlands.

Testing with a new type of LFAS system

From 2000 onwards, we are developing and testing new concepts and algorithms at sea with the successor to the ALF system. This semi-operational Interim Removable LFAS system consists of the Socrates Sonar Source, which we develop, and a towed array from the industry. This system is also used by the Royal Netherlands Navy on board operational platforms to gain operational experience.

This research program leads the Royal Netherlands Navy to procure an operational LFAS (Multistatic Active Passive System) from Ultra Electronics Maritime Systems, with signal processing software LFAPSPRO supplied by TNO. This has been operational since 2014.

Torpedo Defense

Based on the development of LFAS, we are currently working on the next challenge, torpedo defense using passive and active sonar.