SSSI Hydrography Commission News – September 2019

August 31, 2019

New Generation Hydroid REMUS 100 Autonomous Underwater Vehicles have completed sea trials at Cape Cod Bay, Massachusetts, confirming a significant new capability for IHO Order 1 survey that will soon be operated by the Royal Australian Navy.

The evaluation was conducted and analysed by Seahorse Geomatics.  Reference surface data was first collected to provide baseline data for comparison with REMUS survey data. The baseline data was collected using a Norbit iWBMSh-STX which was mobilised aboard a vessel of opportunity. The survey in Cape Cod Bay was more than 60 km from the nearest NOAA tide station in Boston, MA. To compare the 3D Ellipsoidal Referenced Survey (ERS) reference surface with the unmanned underwater vehicle (UUV), a NOAA zoned tide definition file (ZDF) was used and applied for comparison to the PPK navigation solution as the ZDF with Boston tide station was required to be applied to the REMUS with pressure sensor information to vertically locate the vehicle.

Three validation checks were made to confirm the ERS derived reference surface was as a valid surface to test the NOAA zoned tide REMUS data against:

  • RTK positioned plate check compared to PPK derived (ERS) sounding data
  • Applied ZDF surface comparison to PPK- ERS derived surface
  • Comparison of both to a 2007 NOAA survey that overlapped the northeast portion of the survey area.

Prior to the REMUS survey, a patch test was run. During this survey two sets of lines were collected in the same area. The first survey had a line spacing of 45 meters, and the second survey had a line spacing of 25 meters. For all surveys conducted, Navlab was used to collect post processed navigation and motion data.

The completed REMUS 100 survey data, which included Navlab data, showed that the REMUS AUV had the capability to meet IHO Order 1 within both the vertical and the horizontal thresholds set by S-44. BlueZone GM, Andrew Hazell, said thanked Hydroid and Seahorse Geomatics for their support during the REMUS sea trials, “The sea trials have proven a significant new capability for the RAN,” said Andrew, “and BlueZone looks forward to supporting introduction to service of the New Generation REMUS 100 vehicles for Maritime Geospatial Warfare Unit teams.”

New Generation REMUS 100 Autonomous Underwater Vehicle en-route to sea trials in Cape Cod Bay

Left: New Generation REMUS 100 Autonomous Underwater Vehicle en-route to sea trials in Cape Cod Bay

Right: REMUS IHO Performance Report - Based on the performance test, the patch test meets Order 1. The beam angles that met this standard were -72 to - 20 and 19 to 78.

Thanks to Darren Burrowes of BZG for updating us with this information.

Would you like to be featured here? Email HCNC Communuications - Andrew Ternes

HE Award – Nominations are Open!
SSSI is pleased to announce that nominations for the 2019 HE Award are open!
Members can nominate either an individual or a team using the following HE Award Nomination Form.

Completed nominations are to be posted to:
SSSI HE Awards Chair
PO Box 4134

or emailed via:

by COB 30 October 2019.

HE Award judges have requested that nominator/s pay particular attention to the following: justification for the award must articulate a clear description of the individual's or team's performance, its value to the organisation/company or the hydrographic community in general, and any beneficial results arising from such performance.
Regional Conferences
All Commission members are encouraged to attend and participate in your regional conference. For details of Conferences click here

NSW ACT Regional Conference, which will be held on 25-27th September, includes a hydrographic presentation from Zarina Jayaswal and Wendy Stewart

Note that as part of Conferences you can nominate for an APSEA Award; event utilise your HE Excellence Award entry information as a starter!  Details on the Awards, including the Nomination Kit, can be found via: 


If you have any comments or queries please email the Hydro Commission secretariat via:


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