Winarno, A. and Hermawan, M.A.R. 2023. Technical Study of Type B - Series and Kaplan Propellers with Rake Angle Variations on the Offshore Supply Vessel 80 (OSV 80). Zona Laut Jurnal Inovasi Sains Dan Teknologi Kelautan. 4, 3 (Nov. 2023), 309-318. DOI:https://doi.org/10.62012/zl.v4i3.27637.