| 摘要 |
<p>A marine observatory craft (10) for viewing of underwater locations includes one or more planing type hulls (12) with spaced viewing ports (14) associated with the or each hull, which is also provided with one or more transverse bulkheads (15 to 18) dividing the or each hull into a plurality of separate internal compartments (34A, 34B), which are sealed from each other and include one or more ballast tanks (28) that function as supports for seats (13), a control cabin superstructure (11) located above the plurality of internal compartments, and means (21 to 27) for selectively flooding the ballast tanks (28), whereby the craft (10) may move in. (i) a travelling mode wherein the viewing ports (14) are located above the waterline (8); and (ii) an observing mode in which the viewing ports (14) are located below the waterline (9), the flooding means including pump means (21), valve means (23, 24) controlling flow of water through the pump means and an inlet and outlet (22) and there also being provided a feed conduit (27) having separate communication conduits with each ballast tank (28) and venting means (30) associated with the or each ballast tank.</p> |
