10. Air Temperature. Dry bulb and wet bulb temperatures are entered to the 
nearest fenth of a degree Celsius (°C). A negative temperature is coded by drop- 
ping the minus sign and adding 50; 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 in Table 2, Numerical Weather 
Codes - Present Weather. 
13. Cloud. Cloud type and amount are coded as indicated in Tables 3, Cloud 
Type, and 4, Cloud Amount. 
14. Sea. Sea direction and amount are coded as indicated in Tables 1 and 5, 
respectively. 
15. Swell. Swell direction and amount are coded as indicated in Tables 1 and 
6, respectively. 
16. Visibility. Visibility is coded as indicated in Table 7, Visibility. 
17. Water. Color is coded as indicated in Table 8, Water Color. Transparency 
is coded in whole meters from observations taken with a white Secchi disc (30 cm dia.). 
C. 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, 800, 
1000, 1200, 1500, 2000, 2500, 3000, and thence every 1000 meters. 
2. Temperature. The Celsius (°C) temperature is given in degrees and hundredths. 
3. Salinity. Salinity is given in parts per thousand (by weight) to two decimal 
places. 
4, 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 cumulative 
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 computed points. 
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