FERSAH 100-S ONAA is a passive sonar operating in the low and medium frequency range, the signals received are used by the CMS (Combat Management System) employed in submarine to detect and analyze own noise of submarine.
FERSAH 100-S ONAH is a passive sonar operating in the low, medium and high frequency range, the signals received are used by the CMS employed in submarine to detect and analyze noise outside the rigid hull.
FERSAH 100-S General Features