You may be intersted in the Oceans'17 MTS/IEEE conference which is returning to Aberdeen, Scotland in June 2017. Special themes for Aberdeen to include:
Subsea Engineering and Subsea Operations.
Subsea Sensing, Instrumentation and Optical Imaging
Deployment of subsea capabilities in other sectors, e.g. subsea mining, defence etc.
Emerging Technologies for Inspection, Repair and Maintenance.
Fisheries and Aquaculture.
Decommissioning and Salvage.
Marine Renewables (offshore wind; wave and tidal)