Combining communications with a navigation functionality in LDACS1 enables sustainable use of aeronautical L-band spectrum - LDACS1 is well-suited to serve modern ATM application and future needs - The German national project ICONAV is a big step towards industrialization of LDACS1 for combined Com/Nav functionality - First results of the flight measurement campaign within the LDACS-NAV project are very promising - Intensive exchange of results between the two projects.