The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of 13 frequency converters (NIIN: 015874239, PN: 140K040G01). The requirement emphasizes that these items necessitate government source approval prior to award, and interested vendors must submit a proposal along with the necessary documentation as outlined in the NAVSUP WSS Source Approval Brochure. These converters are critical for various military applications, and timely delivery is preferred to meet fleet support needs. Proposals must be submitted via email to Sarah E. Crompton at sarah.e.crompton.civ@us.navy.mil by the specified due date, with further details available in the solicitation documents.