This dataset represents the AIS data used to develop a method for classifying commercial vessel activity. The data is publicly hosted at marinecadastre.gov. The metadata below describes the geographic areas and timespans used in the analysis: Portsmouth Reference start: 01-01-2020 end: 04-01-2020 min LAT: 42.91086 min LON: -70.87039 max LAT: 43.20808 max LON: -70.42733 Portsmouth Trial start: 01-01-2017 end: 04-01-2017 min LAT: 42.92822 min LON: -70.85955 max LAT: 43.14261 max LON: -70.50739 LA/Long Beach Trial start: 01-01-2020 end: 04-01-2020 min LAT: 33.19904 min LON: -118.8477 max LAT: 34.03939 max LON: -117.5002 Oakland start: 01-01-2021 end: 06-01-2021 min LAT: 37.76043 min LON: -122.54220 max LAT: 37.87892 max LON: -122.28100 Houston Bay start: 01-01-2021 end: 06-01-2021 min LAT: 29.44628 min LON: -95.13600 max LAT: 29.68776 max LON: -94.64582 Houston Anchorage start: 01-01-2021 end: 06-01-2021 min LAT: 29.22896 min LON: -94.82127 max LAT: 29.38473 max LON: -94.60308. Citation information for this dataset can be found in Data.gov's References section.