and oxygen are IBM calculations; those for the 

 chemical constituents were derived from 

 straight lines between observed values . 



The profiles of salinity, temperature, 

 and density were prepared from these data, and 

 appear as figures 5-19. 



1 . Cruise Number . The first cruise over the 

 established station pattern (fig. 1) was 

 numbered Gill 1, and subsequent cruises, 

 Gill 2 through Gill 9 (only Gill 3 is covered 

 by the present report) . 



2 . Station Number . Stations are numbered 

 consecutively, starting with one, at the 

 beginning of each cruise. The station pat- 

 tern and numbers as shown in figure 1 

 were maintained on each cruise. If a sta- 

 tion or series of stations was not occupied, 

 these station numbers are omitted. Regular 

 stations have numbers only; standard and 

 special stations are specifically indicated. 



3. Date . Month, day, and year are given . 



4 . Latitude and Longitude. The position of 

 the station is given in degrees and minutes . 



5 . Time. Given in Greenwich Mean Time and 

 is that hour nearest to the start of the first 

 cast. 



6 . Depth . Is the observed uncorrected sonic 

 sounding for the station, recorded in meters . 



7. Wind. Wind speed is given in meters per 

 second. Direction from which the wind 

 blows is coded in degrees true to the near- 

 est ten degrees. The last zero is omitted. 

 North is 36 on this scale and calm is 00. 

 See table 1, "Compass Direction Conversion 

 Table for Wind, Sea, and Swell Directions . " 



8. Barometer . The barometric pressure is 

 coded in millibars, neglecting the 900 or 

 1,000. Thus 996 millibars is coded as 96 

 and 1,008 milUbars is coded as 08. 



9 . Air Temperature. Dry bulb and wet bulb 

 temperatures are entered to the nearest 

 tenth of a degree (centigrade) . 



10. 



Humidity. 

 directly. 



The percent of humidity is coded 



11. Weather . Weather is coded as indicated in 

 table 2, "Numerical Weather Codes --Present 

 Weather . " 



12. Clouds. Cloud type and amount are coded 

 as indicated in table 3, "Cloud Type"; and 

 table 4, "Cloud Amount." 



13. Sea. Sea direction and amount are coded 

 as indicated in table 5, "Sea Amount"; and 

 table I. 



14. Swell ■ Swell directions and amount are 



as indicated in table 6, "Swell Amount"; and 

 table I. 



15. Visibility . Visibility is coded as indicated 

 in table 7, "Visibility." 



16. Water Transparency. Given as meters to 

 which a Secchi disc is visible. 



Subsurface Observations 



1 . Sample Depth. Observed (actual) depth of 

 each sample is given in meters. Interpolated 

 values at standard depths are also given. 

 The standard depths in meters are: 0, 10, 

 20, 30, 50, 75, 100, 150, 200, 250, 300, 400, 

 500, 600, 700, 800, 1,000, 1,200, 1,500, 2,000, 

 2, 500, 3,000, and thence every 1,000 meters. 



2 . Temperature. The centigrade temperature is 

 given in degrees and hundredths. 



3 . Salinity. Salinity is given in parts per thou- 

 sand to two decimal places. 



4. Sigma -t. To convert to density divide by 1,000 

 and add 1 . Thus, a si gma-t value of 22.35 

 converts to a density of 1.02235. 



5 . Dissolved Oxygen. These values are given in 

 milliliters per liter to two decimal places . 



6. Total Phosphorus. Values are given in micro- 

 gram atoms per liter to the nearest 0.1 of a 

 unit. 



