ERRATUM: "Integrated hydrodynamic-electrical hardware model for wave energy conversion with M4 ocean demonstrator"

- Results in section V are shown for a single PTO, rather than per channel as originally stated.  
- Results for the 'high' sea state in Figs 7, 8, 10 and 13 and Table IV are given for Hs =1.0 m for the new Siemens generator, rather than 0.75 m as originally stated, so do not compare directly with the old generator for which Hs was 0.75 m.  
- Revised sponsor information: 'The support of the Western Australian Government, via the Department of Primary Industries and Regional Development (DPIRD), and the Blue Economy Cooperative Research Centre through the project ‘Seeding Marine Innovation in WA with a Wave Energy Deployment in Albany’ is gratefully acknowledged. The Blue Economy Cooperative Research Centre (CRC) is established and supported under the Australian  Government’s CRC Program, grant number CRC-20180101.'

 Summary of changes (version 2):
- References to power per channel have been deleted, and the following sentence added 'Since the plan would be to continue to log data at sea even if one PTO failed and this represents a worst case operation.'   
- Text has been updated to define the high sea state as 1.0 m.  Figs. 6 and 12 and Table IV, together with accompanying text, have been changed to show Hs=1.0 m results for the old generator.