Description / Abstract: Reports on a study of develop user recommendations for a national implementation policy for MLS as the primary landing system in service by the year 2000. Volume I provides recommendations on how best to transition from ILS to MLS; recommends implementation strategy and a national implementation policy, which are summarized in a findings and recommendations chapter. Volume II includes six appendices, which are the reports of working groups in special categories such as Benefits, Airborne Systems Operational Capabilities, and Civil System Costs.