Seabed imagery from GA0357 Davis survey (AAP5093)

Seabed imagery was collected at 25 sites off Davis station, East Antarctica during survey GA0357 from January to February 2017. The survey was conducted in shallow waters (<300 m depth) on the RV Howard Burton as part of Australian Antarctic Program (AAP) Project 5093. The imagery was collected using a downward-facing video camera system and Keldon light which were mounted on a sediment grab or sound velocity profiler (SVP) and lowered using a small winch. The camera was lowered to approx. 0.5-1 m from the seabed for 5 minutes. The video data is unclipped and includes descent and ascent in the water column. Upon retrieval, the data was downloaded and named by station and sequential camera deployment number. The GPS position of the vessel was recorded and the timestamp of the video footage will be used to determine the location of the camera.

The imagery is available on the NCI: https://thredds.nci.org.au/thredds/catalog/fk1/GA0357_Davis_AAP5093/catalog.html with the following file structure: Australian Marine Video and Imagery Data/GA0357_Davis_AAP5093/FILENAME.avi

The FILENAME corresponds to details of each deployment, e.g. GA0357_CAM004_STN025_GR001 is the survey name (GA0357), camera deployment number (CAM004), station number (STN025) and associated grab or SVP deployment number (GR001).

Metadata is available in the Excel file: GA0357_Davis_AAP5093_CAM_Log_FINAL.xlsx A post-survey report is in progress and will be available on eCat when complete.

We thank the AAD/GA/Navy survey team for their assistance in acquiring the data, AAD support staff at Davis station for their support deploying the RV Howard Burton, and AAP Project 5093 Chief Investigator Ursula Harris for pre and post-survey coordination. This dataset is published with the permission of the CEO, Geoscience Australia.