The M/V Taku was mobilized in Ventura Harbor and travelled by sea to the worksite just off Imperial Beach. A full suite of survey equipment was used to acquire seismic, seabed features, bathymetric, and magnetic anomaly data sets, including a Reson SeaBat 8101 Multibeam, an Edgetech 272-TD Sidescan, a SeaSPY Magnetometer, an Edgetech full spectrum profiler (CHIRP) system, and a 2-D high resolution 24-channel streamer and boomer seismic system. The data was acquired over a 500m x 250m survey grid, with an additional set of lines running from the array installation site into shore, in a short period of 3 days.

A Marine Wildlife Contingency Plan was submitted to the State Lands Commission for approval prior to commencing field activities, in accordance with Fugro’s State Lands Geophysical Permit. A marine mammal observer was onboard during geophysical data acquisition operations to document any marine mammals within the survey area.

The bathymetric data was processed using Caris Processing software, Hypack, and Fugro’s Workbench. SonarWiz.MAP was used to process and mosaic the sidescan and magnetometer data. Processing of the Chirp subbottom data was done with Discover and interpreted in SMT Kingdom Suite, and the seismic data was processed by a Fugro contractor and interpreted in SMT Kingdom Suite.

Along with a detailed field report, four charts were created for the client – a surficial features and bathymetry map, a seafloor mosaic, a channel deposits isopach map, and a near surface sand isopach