In LOCOPIAS the calculation of intact stability and longitudinal strength is integrated; both apply on exactly the same loading conditions. The calculation of longitudinal strength determines the distribution of shear force, bending moments, torsion moments and (optionally) sagging. At specific Read Out Points the shear force and moment are compared with the maximum allowable values, as specified by classification societies. An overall conclusion of compliance is shown. This calculation option of LOCOPIAS is optimised for high performance and accuracy; the number of weight items to model the distribution of the light ship weight is virtually unlimited.