This is a procurement for an Inertial Navigation Unit with case, NSN 6605-01-578-7163, with a minimum quantity of 18 EA and a maximum of 438 EA, FOB destination. The item is restricted to Honeywell Inc (CAGE: 0BFA5) or an authorized distributor, and only approved sources/distributors will be considered. The solicitation will explain that the drawings are inadequate to enable competitive bidding. It will also include the DLAD Reverse Auction provision, under which the contracting officer determines after solicitation close whether a reverse auction will be held; participating contractors must register in the reverse auction system and complete online training. Interested parties seeking approved-source status for future buys may contact the Competition Management Office at the provided email address.