This unit is used in training exercises in place of the Mark 46 Torpedo . The majority of the machined components for the Hottorp were fabricated at Sicom under a licencing agreement with Raytheon Integrated Defence System and the United States Government. Since 1996, Sicom has also been providing Fuel Tanks for the Mark 46 Torpedo under a separate licencing agreement. For more information visit www.raytheon.com.