Offshore platform system and method

An offshore platform structure comprising:

• a base member sufficient to provide foundation support against the ocean floor;
• a single column extending upwardly from the base member;
• said column being of such length so as to extend from the ocean floor at the intended erection site to a desired elevation above the water surface;
• a platform slidably mounted around said column so as to allow controlled movement of the platform along the column;
• means for controllably sliding the platform along the column so as to adjust the platform height above the base;
• and means for reversibly affixing the platform to the column at a preferred height;
• said structure having negative buoyancy;
• a plurality of anchors suitably spaced around the structure and attached to the ocean floor;
• a plurality of lower guylines, wherein one end of each lower guylines is attached to an anchor and the other end of each lower guylines is attached to the column below interference depth, interference depth being below the water surface sufficiently so as not to interfere with boats or the like;
• a plurality of upper guylines so stabilize the structure against storm conditions wherein one end of the upper guylines is attached to an anchor and the other end of the upper guylines is adjustably attached to the platform or column;
• and means for reversibly adjusting the upper guylines from a direct guying position between the anchor and the platform to a stow position, said stow position being from an anchor to a point near the column below interference depth and thence to the point of adjustable attachment to the platform or column.