oceanographic observations at each station as 

 soon as it was reached and departing promptly 

 for the next station, with the following excep- 

 tions: any station that was reached between 

 1000 and 1130 hours (local time) was generally 

 worked as a regular forenoon station; any 

 station reached between 2200 and 0200 hours 

 was generally worked as a regular night station; 

 and special arrangements were made to work a 

 few stations as in situ stations. In areas where 

 no station patterns were specified the ships 

 generally occupied only two stations each day, 

 a regular forenoon and a regular night. Thus, 

 most of the stations occupied on these cruises 

 were equivalent to the "special" stations of 

 Holmes and Blackburn (I960), but there were 

 several stations of the other three kinds. 



The operations most consistently carried at 

 regular forenoon stations were: bathythermo- 

 graph (BT) lowering, Nansen bottle cast to 

 approximately 1,000 m. (500 m. in Baja 

 California waters, stations 1 to67onTO-59-2, 

 to agree with CalCOFI procedure); two Van 

 Dorn-type plastic sampler casts to approxi- 

 mately 100 m., for water samples for chloro- 

 phyll _a_ and productivity studies; submarine 

 photometer lowering, to approximately 100 m.; 

 and oblique zooplankton meter-net tow to 

 approximately 300 m. (140 m. in Baja Cali- 

 fornia, stations 1 to 67, TO-59-2, to agree 

 with CalCOFI procedure). 



The operations most consistently carried at 

 regular night stations were: bathythermograph 

 lowering, Nansen bottle cast (as above), oblique 

 zooplankton meter-net tow (as above), and 

 oblique nekton net tow to about 90 m. ; and one 

 plastic sampler cast, on TO-59-2 only. 



The operations performed at in situ stations 

 were those for regular forenoon stations, 

 together with the special operations required 

 for in situ measurement of productivity (see 

 "Methods"). 



Operations at other stations normally were: 

 bathythermograph lowering, Nansen bottle cast 

 (as above), and oblique zooplankton meter-net 

 tow (as above). Occasionally the Nansen bottle 

 cast was omitted or reduced to a single bottle 

 at 10 m. 



Frequent, but not regular observations of 

 other kinds were mainly: surface current by 

 geomagnetic electrokinetograph (GEK), hori- 

 zontal Clarke-Bumpus closing-net zooplankton 

 tows, and surface zooplankton meter-net tow. 



All available station observations, except 

 those made by bathythermograph and GEK, are 

 listed in tables 1 to 3. 



Stations are identified by unhyphenated 

 numbers, e.g., 26, 55. They are all shown, 

 numbered, in figures 1 to 3. 



Observations between stations consisted of 

 bathythermograph lowerings, surface-current 

 measurements by GEK (in certain areas only), 

 and high-speed nekton net tows. The bathy- 

 thermograph and GEK observations are listed, 

 together with similar observations made at 

 stations, in tables 4 and 5; the high-speed net 

 tows are listed in table 6 for TO-59-2, which 

 was the only cruise on which they were made 

 on a routine, nonexperimental basis. A few 

 between- station observations on surface 

 chlorophyll a_ and productivity have been in- 

 cluded with station data in tables 1 to 3. 



Between-station observations are identified 

 by hyphenated numbers, e.g., 26-1 (first obser- 

 vation after station 26), 55-3 (third observa- 

 tion after station 55), 0-2 (second observation 

 after commencement of cruise, prior to station 

 1). They are shown, but not numbered, in 

 figures 1 to 3. 



Continuous observations were made of sur- 

 face temperature (by Taylor or Foxboro 

 thermograph, not mentioned further in this 

 report) and incident solar radiation. 



METHODS 



The following notes refer to the kinds of 

 observations listed in tables 1 to 6. A dash 

 indicates a missing observation. 



Weather observations 



Wind force is given according to the Beaufort 

 scale. Entries for barometric pressure, 

 weather, cloud type, cloud amount (cover), and 



