This is a sources sought notice for Aviation Climate Assessment Survey System (ACASS) Administration and Support Services, with a potential five-year period of performance consisting of a one-year base period and four one-year options. The work will be performed for NAVSUP Fleet Logistics Center San Diego. The notice requests capability statements and feedback on the draft Performance Work Statement, but it explicitly states this is not a solicitation for proposals. The government is conducting market research and emphasizes that if sufficient small business interest exists, the acquisition may be set aside, requiring prime contractors to perform at least 50% of the effort. No budget information is provided in the description.