NOAA's NOS/NCCOS/CCMA Biogeography Team, in collaboration with NOAA vessel NOAA Ship Nancy Foster and territory, federal, and private sector partners, conducted the twelfth year of an ongoing scientific research mission onboard NOAA Ship Nancy Foster, funded by NOAA?s Coral Reef Conservation Program. Data was acquired with a hull-mounted Reson 7125 multibeam echosounder (400 kHz) and a Kongsberg Em710 (100khz) along the shelf edge and slopes south of St. Croix and the banks and shelf edge north of St. Thomas in the US Virgin Islands. Data was processed by a NOAA contractor using CARIS HIPS and Fledermaus FMGT mapping software. Data has all correctors applied (attitude, sound velocity) and has been reduced to mean lower low water (MLLW) using final approved tides from NOAA COOPS. Data is in UTM zone 20 north, datum NAD83, and was conducted to meet IHO order 1 and 2 accuracy standards, dependent on the project area and depth. All users should individually evaluate the suitability of this data according to their own needs and standards.