The Pelagic Fish Spawner Biomass Survey was conducted on the Africana Voyage 126 from 11 November to 7 December 1994. The principal scientific tasks of this cruise were acoustic surveying whilst underway and frequent ad hoc midwater trawling on pelagic fish targets. Temperature profiles and egg samples were to be collected at 5- or 10-mile stations. On selected transects, zooplankton samples were to be collected with a vertical Bongo haul on station and an oblique Bongo tow out of the station. Temperature, light and fluorescence profiles were to be obtained using the Magnum. In addition, on these transects, the water samples were to be collected at the surface and the fluorescence maximum and live copepods collected by means of a drift net for incubation experiments to determine egg production and moulting rates. CTD casts and ADCP measurements were planned for certain stations during both legs.