This seagrass monitoring program supported the environmental management of maintenance dredging operations in the approach channel to Cullen Bay Marina in Darwin. Geo Oceans developed the seagrass monitoring program to meet regulatory requirements and completed surveys prior to (baseline) and immediately after the dredging campaign. Geo-referenced HD video footage, DSLR still images, and GO Visions™ benthic marine habitat GIS data were collected from reference site transects.