The Navy seeks to procure one waveguide switch (NIIN 014608648, PN 677-E-28VDC-P). These items require Government source approval prior to award. If not an approved source, the offeror must submit the information detailed in the NAVSUP WSS Source Approval Brochure with its proposal; offers lacking required data will not be considered. If source approval cannot be completed in time or approval requirements prevent timely acquisition, award may proceed based on fleet support needs. Early and incremental deliveries are accepted and preferred, and the item carries a 12-month warranty with defect discovery within 60 days.