***ONLY SEAPORT MAC HOLDERS ARE ELIGIBLE FOR AWARD UNDER THIS SOLICITATION.*** Request for Proposal (RFP) N6133126R3106 under the Seaport NxG Multiple Award Contract (MAC), for LEGACY LANDING CRAFT AIR CUSHION (LCAC) AND LCAC100 CLASS MAINTENANCE AND REPAIR SUPPORT. This effort has been previously posted within the Seaport NxG portal under the Opportunities page as the following: Sources Sought Notice (N6133125SNQ55), dated 18 September 2025. The follow-up Advance Planning Notice/Pre-Solicitation Notice dated 09 December 2025 was posted in PIEE. ***RESPONSES MUST BE SUBMITTED VIA THE PIEE SOLICITATION MODULE.*** ***ALL DOCUMENTS ARE AVAILABLE WITHIN PIEE ONCE REQUESTED, VETTED, AND APPROVED*** ***QUESTIONS AND ANSWERS WILL TAKE PLACE VIA EMAIL TO THE PRIMARY AND SECONDARY POINTS OF CONTACTS IN THIS NOTICE. RESPONSES WILL BE POSTED AS AN ATTACHMENT TO THE SOLICITATION WITHIN THE PIEE SOLICITATION MODULE.