The Department of Defense, through the Naval Air Warfare Center Training Systems Division (NAWCTSD), is seeking sources for modifications to the Navigation, Seamanship, and Shiphandling Trainers (NSST) Baseline 1 systems. The primary objective is to develop a new Ownship model and modify ship-to-ship physics interactions while ensuring that existing functionalities remain intact. This initiative is crucial for enhancing training systems that utilize proprietary VirtualShip technology, originally developed by General Dynamics Information Technology (GDIT). Interested parties must submit their technical capabilities, including company information and cost estimates, by 1 p.m. EST on April 21, 2025, to Mr. Mark Johnson at mark.e.johnson106.civ@us.navy.mil, with a copy to Mr. Issa Malki at issa.j.malki.civ@us.navy.mil. Note that this is a sources sought notice and not a request for proposals.