This is a sole-source procurement for a specific flight-critical item that requires Government source approval prior to contract award, with only previously approved sources solicited. The Government does not possess adequate technical data or data rights to permit acquisition from other sources. Offers from unapproved sources will not be considered unless they submit all required source approval information as detailed in the NAVSUP WSS brochures. The proposed action is under FAR 6.302-1 and is not a request for competitive proposals, though interested parties may submit capability statements for consideration. Award will be made only if the offeror and product meet applicable qualification requirements at the time of award.