An electric cabinet comprising an outer frame defining the general shape of the electric cabinet and an inner frame comprising fixing uprights and cross-members, a functional assembly fixed onto the inner frame and comprising a plurality of functional units each equipped with a mounting plate designed to receive one or more electric equipment units. In this system, air enters openings or windows in front of concentric tubing and leaves through openings facing vertically downward, thus giving lift to an aircraft’s wing, where needed. The stem structure can include a stem portion that is operable to be positioned in the bone and a C-shaped body portion having a first retaining mechanism formed thereon. The handle assemblies also include a handle for gripping. Subsea currents energize the platform’s payload of energy conversion devices, the electrical output being preferably conveyed via one or more surface-attached cables to an off-board facility for further processing, distribution, or consumption.