A type of effective cross section in terms of an effective refractive index for a wave surface k and for a ray surface) in a plane of incidence for a transverse wave being polarized in a plane of incidence kxy, sxy and normal to the plane of incidence kz, sz. Here during ray surface construction its real meaning was multiplied by 3. The crystalline medium has anisotropy of the form εxx = εyy = εzz = 5; εxy = εyx =2; εxz = εzy = εzx = εyz = 1; μxx = μyy = μzz = 1; μxy = μyx = 0.5; μxz = μzy = μzx = μyz = 0.2