This working publication presents a structural study of the Singapore Stone based on the publicly available images of one face of the surviving fragment. The paper recalls the documented context of the stone, reviews current hypotheses in the field, and explains why some of them are not used as the opening frame of the study. It then sets out the hypotheses retained here, focusing on the stone as a harbour marker, the organization of visible signs, and the possibility of multiple uses and orientations over time. The result is a method sequence that begins with the stone, its setting, and its visual organization before any attempt at script naming, language attribution, or computational reconstruction.