  We analyze analytically and numerically the scale invariant stationary
solution to the internal wave kinetic equation. Our analysis of the resonant
energy transfers shows that the leading order contributions are given (i) by
triads with extreme scale separation and (ii) by triads of waves that are
quasi-colinear in the horizontal plane. The contributions from other types of
triads is found to be subleading. We use the modified scale invariant limit of
the Garrett and Munk spectrum of internal waves to calculate the magnitude of
the energy flux towards high wave numbers in both the vertical and the
horizontal directions. Our results compare favorably with the finescale
parametrization of ocean mixing that was proposed in [Polzin et al. (1995)].
