The U.S. Geological Survey seeks a contractor to service, recalibrate, and repair 20 miniPAR and 1 miniDOT underwater data loggers for its Great Lakes Science Center in Ann Arbor. The work must be completed and equipment returned within 8 weeks of award, with a recommended completion date no later than May 5, 2026, to allow for deployment. This is a sources sought notice to gauge market interest and capability, not an active solicitation. Responses are requested from various business types, including small businesses and socioeconomic categories. Interested firms must submit a capability statement and other required information.