The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of Control Units for Auxiliary Power Units (APUs). This requirement involves a total quantity of six units, with the procurement being classified as a sole source requirement due to the necessity for Government Source Approval prior to award. These control units are critical components in aircraft operations, ensuring reliable power supply and functionality. Interested vendors must provide the necessary documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online, and can direct inquiries to Kate Schalck at 215-697-1020 or via email at kate.n.schalck.civ@us.navy.mil.