The purpose of the survey cruise made on board the RESEARCHER of the Bureau of Fisheries was to undertake experimental otter trawl fishing in Balayan Bay and longline fishing at CSK stations which are known paths of tuna. In addition, it aims to conduct oceanographic and biological observations.
During this survey cruise, 15 CSK stations and two Master stations (A & B) were occupied in a period of seven days from 31 March 1971 to 7 April 1971. During this period, 34 plankton samples using the Norpac net, 17 samples using the stramine larvae net and 12 samples using the nylon net were collected, thus giving a total of 63 plankton samples.