Several studies on the mechanical properties of bamboo slats have been carried out using various types of bamboo species, including Dendro Calamus Asper sp, Gigantochloa Apus sp, Bambusa Arundinacea sp. Until now, variations and combinations of bamboo species have not been carried out, especially about physical and mechanical properties. This paper investigates the effect of variations in bamboo species on the physical and mechanical properties of laminated bamboo slats for ship construction. Each species of bamboo has advantages and disadvantages, which are expected with this combination will produce better physical and mechanical properties. The best value of shrinkage properties occurred in the variation of Bambusa Arundinacea sp with Gigantochloa Apus, namely 3.86 %. This variation also extends the highest mechanical properties: Tensile Strength: 151.9 Mpa; Flexure Strength MOR: 118.6 Mpa; MOE: 5.54 GPa. The Bambusa Arundinacea sp and Gigantochloa Apus hybrid perfectly meet the limit requirements according to the rules of BKI: 2013, Vol vii.

River cruise tourism in Indonesia has a moderately high potential as there are so many rivers in Indonesia that offer beautiful natural and urban views. However, majority of river cruiser boats still use outboard engines, both two-stroke and four-stroke combustion engines. The working system of the outboard engine is to carry out the combustion process of the fuel oil. This combustion process usually has a loud sound, leading to noise pollutants that can harm the environment and make passengers uncomfortable. Burning fossil fuels also causes the residual compounds that increases environmental pollution, especially carbon emissions. In this paper, an analysis will be carried out on the operational costs of a river cruise ship with electric paddle wheel propulsion. With a boat design with an LOA size of 5.4 m, breadth of 1.4 m, height of 0.8 m, draft of 0.3 m, and CB of 0.68, the paddle wheel diameter is 70 cm, blade width of 30cm, and 6 blades. The motor used to drive the paddle wheel has a power of 672.69 watts, with a battery capacity of 100 Ah. According to operational planning, benefits will be obtained, including zero carbon emissions, no noise and operational benefits can be up to 90% greater when compared to the out-board engine drive.