Sandaquaships 2-3 use Sandaeroblock 3 triangular base keel units placed in water, partially filled with water (later water pumped out and air pumped in and sealed); than Sandaeroblock 2 rectangular units piled up, using Sandaeroship crane, with electronic magnetic/vacuum/latches clicked in; external front/back/center panoramic elevator and stairway added; back module units containing electric propellers added. All individually floatable air/aqua sealed slide door carbon modules can be assembled, disassembled, expanded or reduced in minutes or hours.
