The invention comprises a segmented platform for watercraft which, which serves as a stair lift, swimplatform or gangway and can be lowered by an active or passive cylinder and a parallelogram. A topper assembly is mounted to the exterior surface of the substrate over the opening and includes a pre-weakened outline formed therein defining a panel door which is aligned with the opening. Additionally, the file system may employ a hierarchical namespace to store files. Hopper side guides with integral angled shelves engage front side edges of the stack and allow easier singulation of respective bottom sheets.