Chris Chapman (Schlumberger Cambridge Research, United Kingdom) discussed with Vlastislav Cerveny and other researchers in Prague specific problems of wave propagation in anisotropic media: dynamic ray tracing in Cartesian versus ray-centered coordinates, surface-to-surface paraxial matrices in anisotropic inhomogeneous media, specification of models composed of varying anisotropic media of higher symmetry, first-order ray tracing in inhomogeneous weakly anisotropic media etc.