“Early Warning and Real-Time Ship Tracking Using AIS Data and Smartphone GPS”. Journal of Innovation and Technology Polbeng Series on Informatics (INOVTEK Polbeng - Seri Informatika) 10, no. 3 (November 29, 2025): 1918–1925. Accessed August 16, 2026. https://jurnal.polbeng.ac.id/index.php/ISI/article/view/1364.