Abstract: This invention provides a system which includes winding apparatus for haug in and paying out a substantially inextensible steel rope tethering a floating vessel to a moorage or towing vessel, and a control system responsive to signals indicative of the tension in the steel rope and of the length of rope paid out for controlling the winding apparatus. There is also provided an energy reservoir for receiving and storing energy from the winding apparatus when the rope is paid out. The control system operates such that the tension in the steel rope does not exceed a predetermined value.

Abstract: The invention comprises an electric battery of the kind for use with a liquid anode, a liquid cathode and a solid electrolyte, and having a number of cells nested one within the other such that adjacent cells share and are separated by a common electrode.The common electrode may provide a series connection or a parallel connection between adjacent cells.