Almost all countries have rules in place for the registration of air traffic obstacles. Regulations and definitions on what constitutes an air traffic obstacle vary from country to country, as do formalities and procedures of registration. On this page you will find an informative presentation on your right, as well as examples for highline signalisation. Further below are links that explain how different countries with established registration procedures deal with highlines that could become an air traffic obstacle. If you have any questions, feel free to contact us!