In 1983, the groundfish analysis project began a series of yearly cruises designed to assess the annual abundance of juvenile rockfish along the central California coast. Midwater trawls were collected and CTDs performed during late spring of every year since 1983. Initially the cruises were restricted to the San Francisco area; however, in the early 2000's, the geographic range was extended to include San Diego through Fort Bragg.
Collect continuous measurements of ship’s position, sea surface temperature, salinity, turbidity, fluorescence, air temperature, barometric pressure, relative humidity, and wind speed and direction. Actual data collected any given year varies as dependent on funding availability for resources, staffing and sea days