Sustainable Boatbuilding: Evaluating the Feasibility of Recycled HDPE as a Structural MaterialAdristi Nisazarifa, Desrilia Nursyifaulkhair, Amanda Rosalina, I Putu Arta Wibawa and Muhammad Rizki Andika SaputraBIO Web Conf., 216 (2026) 05001DOI: https://doi.org/10.1051/bioconf/202621605001