| http://www.w3.org/ns/prov#value | - Preferably, however, the base structure 10 (see FIG. 2) will be designed to incorporate some sort of means to give it floating capability (such as by the use of low density materials, or by use of a chamber or cavity for vacuum or for low density gaseous fluids such as air, or by the use of some special shape or structural feature to effect floating capability).
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