The correct answer is A) symmetrical and in equilibrium. An ideal mooring system should be symmetrical and in equilibrium to provide a stable and secure platform for the vessel. This ensures that the forces acting on the vessel, such as wind, waves, and currents, are evenly distributed and counterbalanced, preventing excessive stress on the mooring lines and minimizing the risk of the vessel breaking free. Symmetry and equilibrium are key principles in maintaining the integrity and safety of a mooring system. The other options are incorrect because: B) Concentric and in flux is not a characteristic of an ideal mooring system, as it suggests a dynamic and changing state, which is not desirable for a stable mooring setup. C) Distorted and in equilibrium would not be ideal, as a distorted mooring system would not provide the necessary support and balance for the vessel. D) Asymmetrical and in flux would not be an ideal mooring system, as asymmetry and flux (or instability) can lead to uneven forces and potential failure of the mooring system.