This report is a summary of observations and collections made by P.O.B.S.P. personnel in the eastern Pacific Ocean from 18-25 April, 1967. Participating personnel included Brian Harrington (biologist-in-charge), Richard Heiden, and James Lewis. Superior cooperation was received from the officers and crew of the U.S.N.S. SHEARWATER(T-AG 177). The grid track was followed as accurately as circumstances would allow, but due to mechanical failures of the ship,was not completed. On 22 April deviations from the nominal cruise track were made between points E and F in order to mde temporary engine repairs. Instead of continuing west, an, east course was taken from 0940 until 1330; at 1330 the course was once again reversed. Thus, a twenty mile portion of the track for the day was traveled three times. Observations over this transect will be discussed in the grid section of this report. Because of further problems with the main engine, none of the grid track between points H and O was surveyed. Instead a direct course to Long Beach was taken from point H.. All positions on this cruise are considered accurate within five miles. Combined LORAN, sunlines and celestial fixes were taken hourly throughout the grid during diurnal hours; at night only LORAN was used. This report is divided into two sections. The first deals with the grid portion of the vruise while the second covers the non- grid survey. EASTERN PACIFIC GRID SURVEY NUMBER 6 The eastern grid survey was conducted from 1240 hours 19 April through 2400 hours 24 April, 1967. Only about two thirds of the