Efektifitas Penggunaan Radar Navigasi Oleh Perwira Jaga Guna Mendukung Keselamatan Bernavigasi Kapal: Effectiveness of Navigation Radar Use by Watch Officers to Support Ship Navigation Safety. matemar [Internet]. 2025 Apr. 19 [cited 2026 Mar. 12];5(1). Available from: https://e-jurnal.amanjaya.ac.id/index.php/matemar/article/view/50