floating support stabilizes

The support (1) comprises a working deck (2) and floatation members (3) supporting the deck (2). According to the invention, the spacing between the vertical axes (Z) passing through the center of the floatation members (3) is such that the sum of the moments, taken in relation to the horizontal axis passing through the center of the support (1 ) and perpendicular to the wave direction, the vertical forces of excitation of the swell on the floatation members (3) located on one side of the vertical plane (P) passing through this horizontal axis is equal to the corresponding sum associated the floatation members (3) located on the other side of this plane, when the swell period is equal to the period of a wave having this direction and whose annual probability of being encountered on the site where the support is installed is 1/100.