This invention provides a method for installing a self-floating deck structure
with at least one recessed cavity on the bottom of the self-floating deck structure
onto a buoyant substructure. The self-floating deck structure is aligned over a
submerged buoyant substructure and the top of the buoyant substructure is inserted
into a recessed cavity in the self-floating deck structure until the buoyant substructure
mates with the self-floating deck structure at a point above the water surface.
The self-floating deck and the buoyant substructure are connected by welding or
one or more mechanical device.