Raytheon Integrated Defense Systems, Portsmouth, Rhode Island, is being awarded a $59,159,691 modification to a previously awarded contract (N00024-11-C-6410) to exercise an option for the production of MK54 Mod 0 Lightweight Torpedo (LWT) Kits, and related engineering and repair services for upgrade of U.S. Navy LWT. Although the MK54 Mod 0 LWT is primarily intended as an anti-submarine torpedo for littoral scenarios, its basic capabilities includes operation in both shallow and deep water acoustic environmental conditions, and exceeds MK46 anti-submarine warfare capabilities in deep-water scenarios. This modification involves purchases for the U.S. Navy and the governments of India, Turkey and Australia under the Foreign Military Sales program. Work will be performed in Keyport, Washington (60 percent), and Portsmouth, Rhode Island (40 percent), and is expected to be completed by January 2018. Fiscal 2012 and 2014 weapons procurement (Navy), and FMS funds, in the amount of $59,159,691 will be obligated at the time of award. Contract funds in the amount of $2,073,984 will expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, District of Columbia, is the contracting activity.