The experiment BAROC (Baltic Acoustics on Rocky Outcrops) was performed in May 2002. Analysis andmodelling of part of the received data are reported here, concerning transmission loss and reverberation in a shallow-waterarea south of Stockholm. LFM pulses were transmitted in two directions with frequency content between 500 and 5500Hz. In both directions a clear sound channel was observed, for which the optimum propagation frequency was about 4kHz. Strong bottom reverberation was measured. A ray-trace model has been used as forward model for inversion ofbottom parameters with a genetic algorithm. The inversion results were subsequently verified with a parabolic-equationmodel, and they were used to assess the level of reverberation.
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