Simanjuntak, M., April Gunawan Malau, Sajim Budi Setiawan and Sulthan Pasha Ibrahim 2022. Optimization of Maintenance and Supervision of Deck Crane Wire on Mv. Daidan Pertiwi. Dinasti International Journal of Education Management And Social Science. 4, 1 (Nov. 2022), 121–127. DOI:https://doi.org/10.31933/dijemss.v4i1.1521.