The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of FMS spares under the title "66--YAW CLTV BOOST." This procurement is a sole source requirement, necessitating Government Source Approval prior to award, as the Government lacks sufficient data to contract with sources other than the current supplier. The items are critical for automatic pilot mechanisms and airborne gyro components, which play a vital role in navigation and guidance systems. Interested vendors must submit their proposals along with the required documentation from the NAVSUP WSS Source Approval Brochure, available online, and can direct inquiries to Kate Schalck at 215-697-1020 or via email at kate.n.schalck.civ@us.navy.mil.