Ansar, A.A., Luasunaung, A., Sumilat, D.A., Pamikiran, R.D.C., Kaparang , F.E. and Onibala, H. 2023. Study of Planned Maintenance System Senior Admiral John Lie’s Training Ship on Shipping Safety. Jurnal Ilmiah PLATAX. 11, 2 (Jun. 2023), 377–389. DOI:https://doi.org/10.35800/jip.v11i2.48973.