The shipyard Cayber bought us design the laminate and sections of the new carbon masts. These sections were specially designed for these ships as the shipyard will build new matrices. The laminate is designed keeping in mind the performance and weight. What is sought in these carbon masts is not to be livinos but are much stiffer than aluminum masts. This gives more upwind performance which gives much advantage when there are waves. In version 215 two options were calculated with and without backstay.