An offshore electricity production assembly comprising a floating platform , a wind turbine fixed to the floating platform , and inclined mooring tendons connecting the floating platform to a seabed , the floating platform comprising: - a tubular central buoyant column extending along a longitudinal axis (Z) intended to be vertical, the column having an immersed portion defining a first average external diameter (D1) which is the external diameter of a cylindrical tube having the same volume as the immersed portion of the column , and - a plurality of tubular radial buoyant pontoons protruding from the column along radial axes (R1, R2, R3) spaced around the longitudinal axis (Z), each of the pontoons defining a second average external diameter (D2) which is the external diameter of a cylindrical tube having the same volume as the considered pontoon , the pontoons being immersed in a body of water , wherein the first average external diameter (D1) is larger than the second average external diameter (D2), wherein the floating platform is subject to a buoyancy force (E), the column and the pontoons (28A; 28B, 28C) being configured to provide at least 90% of said buoyancy force (F), wherein each of the radial axes (R1, R2, R3) defines an angle (β) with a transverse plan (P) perpendicular to the longitudinal axis (Z), the angle (β) being comprised between - 10° and +10°, and wherein the first average external diameter (D1) divided by the second average external diameter (D2) is comprised between 1.4 and 2.3. - a tubular central buoyant column extending along a longitudinal axis (Z) intended to be vertical, the column having an immersed portion defining a first average external diameter (D1) which is the external diameter of a cylindrical tube having the same volume as the immersed portion of the column , and - a plurality of tubular radial buoyant pontoons protruding from the column along radial axes (R1, R2, R3) spaced around the longitudinal axis (Z), each of the pontoons defining a second average external diameter (D2) which is the external diameter of a cylindrical tube having the same volume as the considered pontoon , the pontoons being immersed in a body of water , wherein the first average external diameter (D1) is larger than the second average external diameter (D2), wherein the floating platform is subject to a buoyancy force (E), the column and the pontoons (28A; 28B, 28C) being configured to provide at least 90% of said buoyancy force (F), wherein each of the radial axes (R1, R2, R3) defines an angle (β) with a transverse plan (P) perpendicular to the longitudinal axis (Z), the angle (β) being comprised between - 10° and +10°, and wherein the first average external diameter (D1) divided by the second average external diameter (D2) is comprised between 1.4 and 2.3. wherein the floating platform is subject to a buoyancy force (E), the column and the pontoons (28A; 28B, 28C) being configured to provide at least 90% of said buoyancy force (F), wherein each of the radial axes (R1, R2, R3) defines an angle (β) with a transverse plan (P) perpendicular to the longitudinal axis (Z), the angle (β) being comprised between - 10° and +10°, and wherein the first average external diameter (D1) divided by the second average external diameter (D2) is comprised between 1.4 and 2.3. <EOS>