9, Barometric Pressure . Barometric pressure is coded in milli- 

 bars, neglecting the 900 or 1000, Thus, 996 millibars is coded as 96 

 and 1008 millibars is coded as 08, 



10, Air Temperature , Dry bulb and wet bulb temperatures are 

 entered to the nearest tenth of a degree (centigrade), A negative 

 temperature is coded by dropping the minus sign and adding $0; thus 

 -10° is coded as 60, 



11, Humidity . The percent of humidity is coded directly, 100 

 percent being coded as 99. 



12, Weather . Weather Is coded as indicated under Tables Defining 

 Code Symbols - II, Numerical Weather Codes - Present Weather. 



13, Cloud , Cloud type and amount are coded as indicated under 

 Tables Defining Code Symbols - III, Cloud Type and IV, Cloud Amount, 



lU, Sea . Sea direction and amount are coded as indicated under 

 Tables (Defining Code Symbols - V, Sea Amount, 



1$, Swell , Swell direction and amount are coded as indicated 

 under Tables Defining Code Symbols - VI, Swell Amount. 



16. Visibility , Visibility is coded as indicated under Tables 

 Defining Code Symbols - VII, Visibility. 



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, hOO, 500, 600, 800, 1000, 1200, 1500, 2000, 

 2500, 3000, and thence every 1000 meters, 



2, Temperature , The centigrade temperature is given in degrees 

 and hundredths, 



3, Salinity , Salinity is given in parts per thousand (by weight) 

 to two decljnal places, 



U, Sigma-t, To convert to density divide by 1000 and add 1, 

 Thus, a sigma-t value of 22,35 converts to a density of 1,02235. 



5, Delta-D . The values in the columns are the anomalies of 

 dynamic depths from the surface to each level in dynamic meters. Each 

 entry is the cumialative sum of the anomalies of dynamic depth of the 

 layer above. These values have been computed for the standard depths 

 only, and serve to Identify confuted points. 



A2 



