High resolution, high accuracy co-registered bathymetry & side scan data
Bathymetry of the calibration area.
Survey results with clear definition of a 40cm high 10m period sand wave field in the shipping channel.
The Remus 100 AUV at start of mission.
GeoAcoustics Ltd (Great Yarmouth, UK) and Hydroid Inc. (Pocasset, MA), both Kongsberg
Maritime companies, have been integrating the GeoSwath Plus wide swath sonar with
the Remus 100 man-portable AUV. In late 2009 a 500kHz GeoSwath Plus (GS+) was deployed
on a Remus 100 for a survey of Buzzards Bay, Massachusetts, USA. The AUV was also
equipped with a full navigation package including a Kearfott T16 Inertial navigation
System aided by an RDL Doppler Velocity Log. This configuration allows the man-portable
Remus 100 to collect high resolution, high accuracy co-registered bathymetry and
side scan survey data.
Two surveys were carried out, 4 lines 500m long for system calibration in Megansett
Harbour and 8 lines 700m long for a survey trial in the bay, with the lines running
across the shipping channel leading to Cape Cod Canal. Lines were run at 3m constant
depth and the bathymetry data was processed in the GS+ software using an 80m swath
width. The excellent quality of the navigation and depth mapping was demonstrated
in the survey results, with clear definition of a 40cm high 10m period sand wave
field in the shipping channel.
This survey trial was the end result of a successful integration project to combine
the most widely used interferometric mapping sonar with the most successful small
AUV, both systems manufactured by Kongsberg Maritime companies. Through linking
these advanced technologies Kongsberg continues to bring the full subsea picture
into sharper focus.
Remus 100 AUV configured with the GeoSwath Plus mapping sonar and INS/DVL navigation package.