TWS Marine's Hybrid Design encompasses two decades of experience operating liftboats and consultation with the world's leading naval architects, shipyards, and critical vendors. Unlike a traditional liftboat, the Hybrid Design utilizes a combination of one tubular and three lattice legs. To arrive at the hybrid leg arrangement, TWS completed an iterative study comparing the hydrodynamic reactions of tubular vs. lattice legs in response to wave action.

 

The single tubular leg permits the vessel to be economically equipped with a leg encircling crane yielding less obstructed boom reach, greater usable deck space, and the ability to make seabed contact in harsher environmental conditions. However, a solely tubular leg vessel would have a greater risk of experiencing harmonic sway while jacked-up as compared to all lattice legs. Therefore, the hybrid-leg arrangement permits a leg encircling crane while the three lattice legs provide sufficient structural stiffness to deter harmonic motions.