Single-beam bathymetry data collected in 2010 and 2011 in the vicinity of Arey Lagoon and Barter Islands, Alaska

Single-beam bathymetry data were collected from a small boat on August 25-29, 2010 using a Humminbird 898 SI Fish Finder with integrated GPS. Accuracy is better than 4 meters (m) horizontal and 25 centimeters (cm) vertical. Data were processed using SonarWiz software and depths were extracted using automated bottom tracking methods. Depth values are meters below the water surface. The 2010 data were not adjusted to a Mean Sea Level datum.

Single-beam bathymetry data were collected in 2011 from a small boat or dinghy using one of three systems: a Humminbird 898 SI Fish Finder with integrated GPS, an Ohmex Sonarmite BT integrated with a Trimble GeoHX series GPS, or a Garmin Sounder with integrated GPS. For shallow areas within Arey lagoon, a small dinghy with a draft of <0.5 m was equipped with the Ohmex Sonarmite; however, even with this low draft, measurements were not possible in the western part of Arey Lagoon owing to the very shallow water depths. Because the substrate was composed primarily of silt, making it unsafe for walking across, it was not possible to obtain depth measurements in this area. Each system collected single-beam water depth with accuracies better than 4 meters (m) horizontal and 25 centimeters (cm) vertical. Data were processed using SonarWiz software and depths were extracted using automated bottom tracking methods. Garmin Sounder and Ohmex Sonarmite data were processed using their respective proprietary software packages. Depth are referenced in meters to approximate mean sea level (MSL) using three months of water-level measurements obtained with concurrently recording Aquadopp and AWAC instruments.

Edited metadata to add USGS Thesaurus keyword terms. In addition to other minor edits to correct typos. No data were changed.