| 摘要 |
PURPOSE:To make even general sightseers possible to take pleasure in underwater sightseeing as the same degree as a scuba diver by constituting an underwater pleasure boat having an self-propelling type underwater sightseeing dome. CONSTITUTION:Floating bodies 1, 2 are provided with propellers 3 and 4, and an interval between these floating bodies is connected to each other by a promenade deck 6. An underwater sightseeing dome 9 having ventilating towers 12, 13 is attached to this promenade deck 6 free of vertical motion. In this underwater sightseeing dome 9, there are provided with a water ballast tank 14 and a pump 16 for pumping and draining. Water is poured into the underwater sightseeing dome and thereby this dome is constituted, thus sightseers are able to enjoy the underwater sightseeing.
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