As part of a larger project to develop a GPS: Loran-C integrated navigation system, Boeing ATM is studying the viability and characteristics of Loran-C radio navigation as an air traffic navigation and positioning system. The purpose of this project is to develop and test a model of Loran-C, including error modeling, to determine its positioning accuracy capability. The team makes recommendations regarding potential improvements and enhancements to determine whether Loran-C is viable for air traffic management.