Abstract: The disclosure relates to a compliant platform for use in deep water. The platform comprises a structure including a working deck positioned above the water by a plurality of leg members which are rigidly connected to the working deck and are pinned into the bottom of the body of water. Horizontal bracing members are rigidly connected between the leg members. Vibration-influencing means are located on the structure to provide the structure with a first mode of vibration with a frequency less than the frequency of the peak of spectral wave density profile expected in the body of water at the location of the structure and a second mode of vibration with a frequency greater than the peak frequency of the spectral wave density profile expected in the body of water at the location of the structure.