Nafila Timami J, Rahayu Surtiningtyas S, Saptandari Y. The Use of High Frequency Radio on Aircraft Operating in the Uncontrolled Airspace of Sam Ratulangi International Airport Manado . Int. Conf. Adv. Transp. Eng. Appl. Soc. Sci. [Internet]. 2025Dec.23 [cited 2025Dec.26];. Available from: https://ejournal.poltekbangsby.ac.id/index.php/icateass/article/view/2309