MCU25 0087 - Reference Document - Coastal Hazard Assessment (As Published)

                      SandMap – Report of Survey for Sunshine Beach Profiles




                      Contents
                              Introduction ...................................................................................................................4
                              Beach Description ........................................................................................................5
                              Personnel ......................................................................................................................6
                              Horizontal positioning ..................................................................................................7
                                        Horizontal datum............................................................................................................ 7
                                        Mapping system ............................................................................................................. 7
                                        RTK post processing ..................................................................................................... 8
                                        Required precision ........................................................................................................ 8
                                        Rejection criteria for position data .............................................................................. 8
                              Horizontal control .........................................................................................................8
                              Vertical datums .............................................................................................................8
                                        Marine datum.................................................................................................................. 8
                              Connection to vertical control .....................................................................................8
                              7.1       Method used to reduce depths to datum ................................................................................. 9
                              Depth measurement .....................................................................................................9
                                        Survey vessel ................................................................................................................. 9
                                        Single beam echo sounder system (SBES) .............................................................. 10
                                        Limiting sea conditions affecting survey quality ..................................................... 10
                                        Method used to determine least depths .................................................................... 10
                              Seabed coverage ........................................................................................................11
                                        Method to ensure seabed coverage criteria is met .................................................. 11
                                        Echo sounder pulse repetition rate ........................................................................... 11
                                        Beam widths along and across track ........................................................................ 11
                                        Survey vessel speed over ground ............................................................................. 11
                                        Rejection criteria for line running .............................................................................. 11
                              Calibration and quality assurance ............................................................................11
                                        Static calibration method ............................................................................................ 11
                                        Dynamic calibration ..................................................................................................... 12
                                        Bar check ...................................................................................................................... 12
                                        Water column sound velocity profile calibrations ................................................... 12
                              Sounding reduction and data presentation .............................................................12
                                        Methods to reduce raw data to sounding datum...................................................... 12
                                        Principle and method used in sounding selection................................................... 12
                                        Principle and process for rounding of soundings ................................................... 13



                      Rev. no.      Doc No.                                         Version Date          Doc Approver
                        1           P0100-20251020                                  20/10/2025            Rod Tansley                                Page 2 of 20

                                               The controlled version of this document is registered. All other versions are uncontrolled.
Document Set ID: 24631530
Version: 1, Version Date: 24/03/2026