Propagation of signals in the water column: measurements and modelling

This paper concerns the underwater environment, and its effects on propagated signals. A synthetic propagation model, which uses parabolic equations, is briefly described. The model requires water surface, water column and lakebed information to predict a signal propagating through such an environment. A trial, which took place in Loch Fyne, Scotland, has provided the environmental data needed to input into the model. The trial also allowed for signals to be transmitted through the measured water column and recorded. Comparisons between the experimental and model predicted signals are presented.