i don't know about a nacra but last thursday i went sailing solo on my Supercat 17... flipped pretty early on... righted the boat with the shroud extenders.... sailed out to the bay realized i lost a lower rudder pin (sloppy stearing) so i decided to head back... went down wind the whole way back.... then something looked funny... well the base the mast rotates on was broken.... the bas of the mast was sitting on the broken piece... not really sure how it broke or how it stayed up... well got to land safely thank goodness.... fipped the boat on its side mast popped off.. boat fell over caught it and flipped it upright... no real damage... i have an extra base so just change it out and on we go.....