This paper describes the architecture being installed to provide FIS-B in Alaska and discusses the issues governing extending the architecture to the lower 48 states. Among the issues addressed is the apparent conflict with a FAA Policy on FIS Data Link that has resulted in contracts with two vendors. Capstone is a test program, while FIS Data Link is a commercial venture providing services and equipment to users in the lower 48 states. Both initiatives have a common goal in mind, to reduce weather-related accidents by providing better real-time information to the pilot in the aircraft, but their implementation approaches are different. Recommendations for enabling the two architectures to co-exist in a manner that maximizes interoperability while minimizing infrastructure and avionics costs are provided.
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