Offshore Platform Jacket Launching is a critical stage in installing fixed offshore oil and gas structures. The jacket is the large steel lattice framework that serves as the foundation for fixed platforms, designed to be anchored to the seabed using piles. Launching refers to the process of transferring the completed jacket from a fabrication yard or installation vessel into the water, ready for positioning and pile driving. | Thialf - Engineers & Constructors

Offshore Platform Construction: Topside Module Installation On an offshore oil platform, topsides (c.f. jacket structure, which constitutes the lower half of the platform structure, partly submerged in sea) refers to the upper half of the structure, above the sea level, outside the splash zone, on which equipment is installed. This includes the oil production plant, the accommodation block and the drilling rig. They are often modular in design and so can be changed out if necessary allowing expe