The two-scale expansion method for weakly irregular ocean waveguides with current perturbation

The two-scale expansion method is generalized to the case of weakly irregular surface and depth waveguides with current perturbation. This permits estimating the effect of currents on the acoustic field under relevant propagation conditions.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 148, pp. 68–78, 1985.