A composition and process for improving the quality of raw food product such as seafood, meat and fowl including a treatment of a bath, rinse, ice blend, steam or spray for preparing the raw food product, such as fresh fish, meat or poultry or produce. The computer system may encounter conditions where access to numerous networks, in particular wireless networks, is not available. An isotropic depth migration of P-P depth consistent image gathers is determined based upon the depth zo, P-wave velocity vpo, and S-wave velocity vso to estimate a vertical isotropic depth zpp of the subsurface layer.