ES60 Water Column Sonar Data Collected During FR0307

Sardine Survey. Forty-two primary stations were occupied during the survey. At each station the following activities were performed: a. Deployment of a Seabird SeaCat down to 100 meters, bottom depth permitting. The self-contained CTD collected depth, temperature, conductivity and chlorophyll data. b. A standard Pairovet cast was deployed concurrently with the CUFES system. The Pairovet net was fished from 70 meters to the surface (depth permitting) using paired 25 cm diameter 150 µm mesh nets. The technical requirements for the Pairovet tow was: Descent rate of 70 meters per minute, a terminal depth time of 10 seconds and an ascent rate of 70 meters per minute. All tows with wire 2 angles exceeding 15° during the ascent were repeated. c. Standard meteorological data including SST, wind speed and direction, wave height and direction, cloud cover, relative humidity, air temperature and barometric pressure. d. During all transit between stations continuous measurements were made of pelagic fish eggs (CUFES) and acoustic targets using the ES-60. All acoustic targets and egg densities were recorded for reoccupation during the night portion of the survey.