This is a sole source procurement by NOAA’s Center for Operational Oceanographic Products and Services for Septentrio receivers and spare parts from ITC Electronics in Carson, CA. The equipment is required to support critical environmental monitoring systems in the National Water Level Observation Network, which provides data for marine navigation, coastal infrastructure protection, and NOAA forecast models. The Septentrio POLARX5 receiver is the standard GNSS receiver used across the Atlantic Coast, Gulf of America, Caribbean, Great Lakes, and Pacific, and has been engineered to withstand harsh marine environments. Procuring different components would require extensive testing, integration, training, and additional costs and resources, causing significant delays. No budget amount, submission timeline, or performance location beyond the existing network areas is specified.