Nugraha, I.M.A., Rasdam, R. and Rajab, R.A. 2021. Increased Activities of Watchkeeping in the Operation of the Marine Engine at Hasil Melimpah 18 Vessel. Jurnal Sumberdaya Akuatik Indopasifik. 5, 4 (Nov. 2021), 439–446. DOI:https://doi.org/10.46252/jsai-fpik-unipa.2021.Vol.5.No.4.179.