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CASIUS calibration recommendations

09 January 2024

The following system setup is recommended prior to starting a CASIUS calibration.

  1. Confirm all software and firmware versions are up to date.
  2. Test the HPT operation by running the HPT tests.
  3. Use Sonardyne 6G beacons. Complete a pre-deployment 6G Terminal Lite test to confirm operation and store the report.
  4. Set the Sonardyne 6G beacon address to 27xx or 28xx (xx = 01 – 14).
  5. All external instrument inputs should be input direct to the NSH or ESH for the CASIUS calibration. Confirm the inputs prior to and during the CASIUS calibration if there are any dropouts stop, investigate, and resolve. You may need to re-run the calibration leg.
  6. The GNSS accuracy recommendation is RTK Float.
  7. The minimum input rate are VRU 10 Hz and Gyro 5 Hz.
  8. Confirm (DIMCON) the GNSS antenna and HPT offsets to the CRP. Make sure these offsets are input directly to Ranger 2 for the CASIUS calibration.
  9. Set the “Operating Range” in the Environmental page.
  10. Set the Geodesy.
  11. If possible, use a Sound Speed profile for the local operational area.
  12. Always use the 1/3 water depth even when using run lines or Clover leaf patterns.
  13. Run a Noise test prior the CASIUS calibration on the headings that will be used.
  14. Use the Acoustic Link Status tool to optimise the beacon acoustics. Check the beacon positions during the CASIUS calibration and if there are multiple missed or jump in position stop, investigate, and resolve. You may need to re-run the collection leg.


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