Design and Stability Analysis of the Galaherang Tourist Vessel Using Maxsurf Software

Abstrak

The safety of river tourism vessels depends on hull geometry, loading conditions, and adequate intact stability, yet vessel-specific numerical evidence for the Galaherang tourist vessel operating on the Kapuas River remains limited. This study evaluates its hull design, hydrostatic properties, and intact stability using Maxsurf Modeler and Maxsurf Stability. A three-dimensional hull model was developed using a length overall of 21 m, beam of 5 m, depth of 3 m, and operational draft of 1.61 m, with an intended capacity of 97 passengers and four crew members. Upright hydrostatic calculations, equilibrium analysis, and large-angle righting-arm (GZ) simulations were performed, and the results were compared with selected IMO and BKI stability reference criteria. At the evaluated loading condition, the vessel had a displacement of 66,280 kg, a block coefficient of 0.494, and a corrected transverse metacentric height (GMt) of 0.957 m, exceeding the IMO reference minimum of 0.15 m. The maximum GZ was 0.523 m at a heel angle of 45.5°, while the reported passenger-crowding and turning simulations produced heel angles of 7.5°–10°. These findings indicate favorable predicted stability under the modeled assumptions and provide preliminary technical guidance for river tourist vessel design. However, comprehensive regulatory compliance and operational safety require further verification and field validation under representative river conditions.