Geographe Subsea Installation & Commissioning: Acoustic Monitoring and Updated Modelling
June 2021 — Southern Australia
Client: Beach Energy Ltd
Appendix 7 – Sound Transmission Loss Modelling Report (Updated)
Appendix 8 – Beach Otway Development Acoustic Monitoring
Underwater sound monitoring and acoustic characterisation of drilling activities by the Ocean Onyx Mobile Offshore Drilling Unit (MODU) and of associated support vessels at the offshore natural gas fields of the Otway Basin. Four AMARs in C-Lander moorings were deployed at increasing distances from the MODU. The results were compared against the previously modelled sound field predictions from the draft Environment Plan. The findings provided a better understanding of the propagation loss environment, enabling a recalculation/update of the modelled scenarios to provide more accurate distances to acoustic thresholds for impacts to marine mammals.
