Nafila Timami, Jihan, Sri Rahayu Surtiningtyas, and Yuni Saptandari. 2025. “The Use of High Frequency Radio on Aircraft Operating in the Uncontrolled Airspace of Sam Ratulangi International Airport Manado”. Proceeding of International Conference of Advanced Transportation, Engineering, and Applied Social Science, December. https://ejournal.poltekbangsby.ac.id/index.php/icateass/article/view/2309.