AREA COVEEED 



The area BurTeyed during 1951 is shown in figure 1. The month "by 

 month coverage, hy area, is summarized in text table 1. There were 12 

 survey cruises made during 1951 • The average nimber of stations occupied 

 per cruise was 120, but as few as 65 and as many as 170 stations were 

 occupied on a cruise. 



Intensity of coverage in different parts of the survey area varied 

 with need. The area off northern California (Lines 40-5?) was surveyed on 

 only two cruises made in July and August. The coverage off central Cali- 

 fornia was much more thorough, stations having been occupied on Lines 60- 

 77 during every month except February and March. The area between Pt, 

 Conception and Pt. Abreojos (Lines 80-1 37) was surveyed monthly during 1951 » 

 although the coverage was abbreviated in December. The area off southern 

 Baja California was surveyed three times: during March (Cruise 23), June 

 (Cruise 26) and September (Cruise 29). 



Six vessels participated in one or more cruises. These were the 

 CEEST, HORIZON and PADLINA T. of the Scripps Institution of Oceanography, 

 the N. B. SCOFIELD and YSUDWUSi of the California Department of Fish and 

 Game, and the BLACK DOUGLAS of the U. S. Fish and Wildlife Service. Two 

 to four vessels were used on each of the monthly crtiises. A tabulation of 

 the vessels employed on each cruise during 1951 is given in text table 2* 



Text table 2. Research vessels participating in the 

 collection of material during 1951' 



No. 

 Cruise vessels BLACK N.B. 



Month No. used DOUGLAS CREST HORIZON SCOFIELD PAOLDfA T. YELLOWFIN 



X 



X 



X 



z 

 z 



z 



Total (12) 3^ 10 11 6 1 k 2 



