Introduction
This WINGHEAD i80S state-of-the-art sonar was deployed specifically to scan and map the underwater bridge pillars, providing highly detailed bathymetric data. The combination of the WINGHEAD sonar’s precision and the steerable transmit feature ensured thorough coverage even in challenging underwater environments.
The survey environment presented significant challenges due to water quality, which was extremely muddy and turbid (as visible in the Google Map image). Additionally, an underwater current of approximately 2-3 knots made steering the vessel particularly difficult.
Multibeam Echo sounder
For the survey the NORBIT WINGHEAD i80S was used, this sonar is a superior performance ultra high-resolution integrated 3D & 4D medium range motion stabilised bathymetric system. Designed to perform in extreme operational environments with high vessel motion, this cylindrical ultra-high resolution curved array bathymetric system, allows for rapid anywhere anytime mobilization.
- Active Roll & Pitch Stabilisation
- Backscatter Outputs (Intensity, Sidescan, Snippets, Water Column)
- Multidetect
- Integrated Sound Velocity Probe
- 1024 Dynamically Focused Beams
- FM & CW Processing
- Exceeds IHO Exclusive Order & USACE New Work
Installation
- Installation at Ligang Jetty
- Sonar was mounted starboard side of the vessel with both Antenna 1 & Antenna 2
- Installation took about an hour
- Utilising the WINGHEAD i80S fully stabilised system
- GNSS RTK NTRIP corrections were interfaced to the system in real time, using the NORBIT GUI integrated NTRIP client
Vessel Spec:
- Length Overall (LOA): 15.2m
- Breadth Overall (BOA): 3.1m
- Gross Tonnage: 100 tons
- Net Tonnage: 80 tons
- Height: 5.3m
- Draft: 1.20m
Survey Area
Summary
Although the water quality and environment around the site were challenging, the WINGHEAD i80S Multibeam Echo Sounder successfully acquired excellent datasets, as demonstrated.
The WINGHEAD i80S's STX feature, when enabled, enhanced survey efficiency by utilizing its 3D scanning capability for the insonification of complex bridge pillar structures.
