Swivel-based mooring device and system

A swivel-based mooring device for a marine energy device, the device comprising:

• a housing configured for placement along a primary mooring line of a marine energy device;
• a slip ring disposed within the housing and configured to transmit electrical power through the mooring device while permitting relative rotational motion between an upper portion and a lower portion of the mooring device;
• a rotary union swivel joint disposed within the housing and configured to transmit fluid through the mooring device while permitting relative rotational motion between the upper portion and the lower portion of the mooring device;
• wherein the slip ring and the rotary union swivel joint are coaxially arranged to allow continuous rotation of electrical conductors and fluid lines through at least 360 degrees about a longitudinal axis of the mooring device;
• an integrated spring damper mechanism positioned within the housing and operatively coupled to the electrical conductors and the fluid lines;
• wherein the integrated spring damper mechanism is configured to absorb axial loads applied to the electrical conductors and the fluid lines without absorbing mechanical energy from the marine energy device;
• and
• wherein the swivel-based mooring device is configured to reduce twisting, fatigue, and axial loading of the electrical conductors and the fluid lines during operation.