R2Sonic 2022 - Page 8

Page 8 of 133
Version 3.0 Rev r000
Date 25-08-2010
Part No. 96000001
Appendices
Appendix I: Multibeam Survey Suite Components
8 Auxiliary Sensors and Components ........................................................................................ 73
8.1 Differential Global Positioning System .................................................................................. 73
8.1.1 Installation .................................................................................................................... 73
8.1.2 GPS Calibration.............................................................................................................. 74
8.2 Gyrocompass ................................................................................................................... ...... 75
8.2.1 Gyrocompass Calibration Methods ............................................................................... 75
8.3 The Motion Sensor ................................................................................................................ 80
8.4 Sound Velocity Probes ........................................................................................................... 81
8.4.1 CTD Probes .................................................................................................................... 82
8.4.2 Time of Flight Probe ...................................................................................................... 83
8.4.3 XBT Probes .................................................................................................................... 83
8.5 The sound velocity cast ......................................................................................................... 84
8.5.1 Time of Day ................................................................................................................... 84
8.5.2 Fresh water influx ......................................................................................................... 84
8.5.3 Water Depth ................................................................................................................. 84
8.5.4 Distance ......................................................................................................................... 84
8.5.5 Deploying and recovering the Sound Velocity Probe ................................................... 84
Appendix II: Multibeam Surveying
9 Introduction .......................................................................................................................... 87
9.1 Survey Design ........................................................................................................................ 87
9.1.1 Line Spacing ................................................................................................................... 87
9.1.2 Line Direction ................................................................................................................ 87
9.1.3 Line Run-in .................................................................................................................... 88
9.2 Record Keeping ..................................................................................................................... 88
9.2.1 Vessel Record ................................................................................................................ 88
9.2.2 Daily Survey Log ............................................................................................................ 89