This is a sole source procurement notice for Nortek profilers and batteries to be delivered to Chesapeake, Virginia. The equipment is required as spare parts for existing waterway current monitoring systems, and delivery is required within 60 days of award. The justification is that Nortek USA Inc. is the sole authorized provider and manufacturer of this specialized oceanographic equipment, which is compatible with the government's existing systems. While this is not a request for competitive proposals, firms believing they can meet the requirements may submit substantiating documentation to the point of contact within 15 days of the synopsis publication.