Guba
Contributor
Much like diving an oil platform. These things often stand in over 400 feet of water, and the legs just extend down into the blue and out of sight. While diving close to the legs and supports, the feeling is like being close to a wall. However, if you move just a bit away, you get that "suspended" feeling that some find disconcerting. Same rules apply, though...just watch your trim and buoyancy, and there aren't any problems.