The FAA is conducting a market survey to identify vendors capable of supplying multiple items of test equipment under a contemplated Blanket Purchase Agreement (BPA) to support the National Airspace System (NAS). This survey is for informational and acquisition planning purposes only, and the acquisition strategy has not yet been determined. Performance would involve shipping to multiple government locations both within and outside the Continental United States. The government anticipates setting the contract aside for small businesses, with the principal NAICS code being 334513 and a size standard of 750 employees. This is not a request for proposals, and the FAA will not reimburse any costs incurred in preparing a response.