Donated data 2021-604-DD

Identifier 2021-604-DD
Data provider Three donated AUV cruises were conducted aboard the MBARI R/V Rachel Carson from 25-28 April 2018, 14-19 March 2019, and 10-11 May 2019. These surveys targeted channel, pockmark, and structural features in the CalDIG (California Deepwater Investigations and Groundtruthing) study region. A total of 20 AUV dives between the three cruises were conducted. The MBARI AUV carries a Reson 7125, a 400 kHz multibeam sonar system, and an Edgetech 1-6 kHz Chirp sub-bottom profile system (e.g., Caress et al., 2008). The 20 AUV surveys contain coincident ultrahigh-resolution multibeam bathymetry and low-altitude Chirp data. During multibeam acquisition, Chirp tracklines were conducted parallel to multibeam contours and tied together with widerspaced crossing lines. All data were processed by MBARI technicians. AUV bathymetric data were generally gridded to ~1 m cell size, and Chirp sub-bottom profile data were altitude corrected. AUV bathymetry and Chirp data will available for download via a USGS data release in spring of 2021.
Location Morro Bay, California
Comments Location-Elevation USBL - Kearfott SeaDevil inertial navigation system (INS). Cruise affiliated with: 2021-603-DD and 2021-605-DD.
Start (port not specified) 2019-03-14
End (port not specified) 2019-03-19
West -122.54150391
East -120.16845703
North 35.6215819
South 33.66949697


Crew members
Information specialist(s)
Maureen AL Walton
Specialist, Information

Data types and categories

Data category: Location-Elevation, Seismics
Data type: Navigation, Sub Bottom Profiler

Equipment used

Equipment Usage description Data types Datasets
Other Unknown, Profiles, Transects, Benchmarks, LIDAR, Navigation (no data reported)
0.5-16 kHz Sub Bottom Profiler (no data reported)
0.5-16 kHz receiver Sub Bottom Profiler 1


Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Donated AUV bathymetry data collected during Monterey Bay Aquarium Research Institute (MBARI) cruise in March 2019 offshore of south-central California 0.5-16 kHz receiver This dataset consists of autonomous underwater vehicle (AUV) bathymetry data collected in March 2019 aboard the R/V Rachel Carson, which is owned and operated by the Monterey Bay Aquarium Research Institute (MBARI). During the cruise, bathymetry data were collected across eight AUV dives, all eight of which collected coincident bathymetry and Chirp seismic-reflection data. The collection of these data was funded entirely by MBARI, and the data have been donated to the U.S. Geological Survey (USGS). The data were collected in collaboration with the USGS and the Bureau of Ocean Energy Management (BOEM), and they are located in the same study area as the collaborative California Deepwater Investigations and Groundtruthing I (Cal DIG I) project. The purpose of the overall Cal DIG I study is to assess shallow geohazards, benthic habitats, and thereby the potential for alternative energy infrastructure (namely floating wind turbines) offshore south-central California due to the study area's proximity to power grid infrastructure associated with the Morro Bay power plant. The AUV data in this part of the data release provide ultra-high-resolution seafloor imaging of eight different patches of seafloor offshore of the south-central California coast. The AUV mapping navigation has not been accurately positioned and is considered as only partially processed. Daniel J Kennedy


Samples collected during this field activity