 After surfacing, this plane could be rolled out, quickly assembled, and launched by ballasting the sub until the deck was awash.These experiments were carried out into 1926 using the Martin-built plane, constructed of wood and fabric, and the all-metal Cox-Klemin versions, XS-1 and XS-2.The first full cycle of surfacing, assembly, launching, retrieving, disassembly, and submergence took place on 28 July 1926, on the Thames River at New London.