This report is a summary of observations and collections 
made by P.J.B.S.P. personnel in the eastern Pacific Ocean from 
11-24 March,1967. Participatiag personnel included Brian Harrington 
(biologist-in-charge), David Burckhalter, and James Lewis. 
Superior 
cooperation was received from the officers and crew of the U.o.N.S 
SHEARWATER. (T-AG 177). The grid track was followed as closely 
as circumstances would allow, but due to equipment failure and 
weather conditions a few deviations will be noted. First, oi. the 
night of 14-15 March a departure from the grid was made at point 
for rnp^tr 
"D" in orcer to go to Port Hueneme A of the ship's steering. After 
t'.vC cays in port, we returned to point "D" on the night or 17-18 
The biologist in charge does not feel that this interrup¬ 
tion had any significant effect on grid observation data. Othe, 
deviations from the nominal track will be noted between points 
"G" and "H" , and can be accounted for by the fact that the L«JRA»\ 
was inoperative, and due to cloudy weather there were no accurate 
fixes. Although not shown on map one, it is quite possible that 
the t.ack between points "M" and "0" was also inaccurate for the 
same reason. Diurnal positions in this section of the grid should 
be considered accurate only to the nearest ten miles, and within 
five mile over the remainder of the grid cruiee. All nocturnal 
posi'ions are probably within ten miles. 
Eastern G rid Survey Number 4 
The eastern grid survey was conducted from 1200 hours 12 
Marc:, until 2345 hours 22 March, 1967 with an interruption of 
thre~- davo from 14-17 March. A total of 89.6 hours of diurnal 
J 
observati n were conducted over 826 linear miles. A summary may 
