Patent ID: 7455026

Claim:
A structure for use in a body of water, which comprises: (a) a structure having a length in a fore-and-aft direction between front and rear ends thereof and a width in a side-to-side direction between opposite first and second sides thereof, the structure also having at least one level that includes a weight bearing deck on which people can walk or stand; (b) at least a pair of wheels that can be at least temporarily attached to the structure to allow the structure to be transported by ground by rolling the structure over the ground; and (c) a ballast system carried on the structure which may be selectively filled with water to add weight to the structure or emptied of water to remove weight from the structure, wherein the ballast system includes: (i) a first row of a plurality of water receiving and water holding ballast tanks, wherein the first row of ballast tanks extends in the fore-and-aft direction relative to the structure with the first row of ballast tanks being disposed along the first side of the structure; and (ii) a second row of a plurality of water receiving and water holding ballast tanks, wherein the second row of ballast tanks extends in the fore-and-aft direction relative to the structure with the second row of ballast tanks being disposed along the second side of the structure, the ballast tanks in the second row being spaced in the side-to-side direction from the ballast tanks in the first row across the width of the structure.