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

                      SandMap – Report of Survey for Sunshine Beach Profiles



                                        Single beam echo sounder system (SBES)
                                 The CEE ECHO system from Cee Hydrosystems was used for the project. Transducer frequency
                                 was 200kHz, 9° beam width and a ping rate of 20hHz. Points were later thinned to
                                 approximately 1m. The system comprises of a transducer mounted to a custom bracket
                                 starboard side aft and a GNSS antenna mounted on a pole directly above the transducer. The
                                 SBES controller is installed in the box on the rear. A Panasonic Toughbook tablet is mounted
                                 at the steering position with CEE Connect software installed to enable full control over the
                                 SBES settings remotely. BeamworX hydrographic software is installed for all acquisition work.
                                 Specifications for the equipment can be found in Appendix D: Equipment Specifications.




                                       Figure 5: CEE ECHO Controller



                                          Limiting sea conditions affecting survey quality
                                 Survey conditions ranged from 3 to 8 knot winds, predominantly from the south. Swell was
                                 approximately 1m with a slight sea.

                                        Method used to determine least depths
                                 Depths were logged as soundings and displayed in BeamworX in real time along with the full
                                 echogram. Processing and cleaning was carried out in BeamworX Autoclean using full
                                 echogram information to determine true seabed. After data cleaning, points were thinned to
                                 approximately 1m intervals.




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

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Document Set ID: 24631530
Version: 1, Version Date: 24/03/2026