NOVELTY - The submerged system (300) has a lower tether (310) and an upper bearing module (320). The tether has an anchoring point (315) for anchoring the system to the seabed (720), a buoyant body providing positive buoyancy for floating the tether in upright orientation, and a frame structure for structural integrity. The bearing module connected operatively to the tether has a housing enclosing a bearing unit for supporting the rotation of a marine device (340) and a connecting point (332) for the device. The module is arranged above the tether as seen in the axial direction (A) of the system.    USE - Submerged system for anchoring marine device such as sub-sea kite assembly within fluid. Can be used in a tidal power plant system.    ADVANTAGE - The connecting point is arranged underneath the sub-sea kite assembly, allowing for easy access and maintenance. The lower tether is allowed to better meet forces from the tidal current without being twisted or positioned unfavorably sideways as seen in the tidal water current direction. By the interlocking mechanism and shape of the lower tether, the submerged system facilitates easy assembling and mounting. Increases robustness and reliability, by integrating the cable to the system. Force on the piston is low enough to return to its original position, allowing the hydraulic unit to withstand larger axial forces without increasing the piston flange diameter. Since the frame structure adds structural integrity to the submerged system, the system can be kept upright even during slack water situation, while the tether is provided with improved stiffness and robustness. The submerged system also offers improved installation and maintenance facilities compared to a mooring system or submerged system with a bearing unit located on or near the seabed. The submerged system is also less expensive in terms of installation and service costs compared to existing sub-sea kite assemblies and corresponding submerged system.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of a submerged system to which a sub-sea kite assembly is anchored.    Submerged system (300)    Lower tether (310)    Anchoring point (315)    Upper bearing module (320)    Connecting point (332)    Marine device (340)    Seabed (720)    Axial direction (A)