The IDAS (Interactive Defence and Attack System for Submarines) is a submarine-launched missile system developed by the German company Diehl BGT Defence. It is designed to provide submarines with a self-defence capability against anti-submarine warfare threats, such as helicopters, maritime patrol aircraft, and surface ships.The IDAS missile is a compact, lightweight weapon that can be launched from a submarine’s torpedo tubes. It has a range of up to 20 km and can be guided to its target by a fiber-optic link or an infrared seeker. The missile is capable of engaging both stationary and moving targets, and it can be programmed to attack specific points on a ship, such as its bridge or propulsion system.The IDAS system also includes a launch control unit and a fire control system, which allow the submarine crew to launch and guide the missiles from the safety of the submarine. The system is fully integrated with the submarine’s combat management system, which provides real-time situational awareness and targeting information.The IDAS system has been integrated into the German Navy’s Type 212A submarines, and it has also been sold to other navies around the world, including the Republic of Singapore Navy and the South Korean Navy. The system has been praised for its effectiveness and reliability, and it has demonstrated its capabilities in numerous live-fire exercises and operational deployments.