Hydrographic Survey of Green Island Jetty and Approach Channel

QOffshore, in collaboration with TSS, recently completed a detailed Hydrographic Survey at Green Island, located off the coast of Queensland, Australia. This project — though modest in scale, perfectly embodies why our team values small, meaningful assignments: they offer not only technical satisfaction from the quality of the end product but also the unique experience of working in such an idyllic and environmentally rich location.

The objective of the survey was to map the Green Island Jetty and the approach channel”.

The designated navigational corridor leading from open water toward the Green Island Jetty in meant to provide sufficient depth and clearance for vessels during approach and berthing operations. Accurate hydrographic data for such channels are critical for verifying depths, assessing sedimentation, and maintaining safe under-keel clearances.

To execute this Bathymetric Survey, the team deployed a Norbit Multibeam Echosounder (MBES) integrated with Trimble GNSS antennas and corrected using RTK from an Emlid GNSS receivers positioned on the island’s only established benchmark. This configuration ensured real-time tide and position corrections, delivering centimetre-level accuracy and seamless data alignment to chart datum.

Over several days, our surveyors collected and processed high-density bathymetric data covering the jetty structure, seabed morphology, and approach channel alignment. The Norbit MBES system’s wide-swath capability and high ping rate produced excellent detail even in shallow waters surrounding the reef margin, while the use of compact vessels allowed for safe manoeuvrability within the confined area.

Beyond the data and precision, this project offered our team a rare opportunity to experience the vibrant natural setting of Green Island — surrounded by turquoise waters, coral reefs, and a calm tropical atmosphere. Between survey lines and equipment calibrations, the team enjoyed moments that reminded us why we love our work: combining advanced Hydrospatial technology with environments that truly showcase the beauty of the marine world.

The Green Island Hydrographic Survey stands as another example of how collaboration between QOffshore and TSS continues to deliver accurate, efficient, and environmentally conscious marine survey solutions. Whether for port infrastructure, environmental monitoring, or navigation safety, QOffshore remains committed to integrating modern MBES and GNSS technologies to deliver precise, reliable, and meaningful results.