1 1 . Air Temperature . Dry bulb and wet bulb temperatures are entered to 

 the nearest tenth of a degree Celsius (°C). A negative temperature is coded by 

 dropping the minus sign and adding 50; thus -10° is coded as 60. 



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

 being coded as 99. 



13. Weather. Weather is coded as indicated in Table 2, Numerical 

 Weather Codes - Present Weather . 



14. Cloud. Cloud type and amount are coded as indicated in Tables 3, 

 Cloud Type, and 4, Cloud Amount. 



15. Sea. Sea direction and amount are coded as indicated in Tables 1 

 and 5, respectively. 



16. Swell . Swell direction, and amount, ore coded as indicated in Tables 

 1 and 6, respectively. 



17. Vis. Visibility is coded as indicated in Table 7, Visibility. 



18. Water. 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. 



2. Temperature . The Celsijjs (°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 . 



6. Dissolved Oxygen. These values when given are in milliliters per liter 

 ro two decimal places. Values of 10.00 or above rarely occur and are coded 

 as 9.99. 



7. Sound Velocity. Sound velocities were computed by Wilson's 

 equation and are recorded in feet per second to one decimal place (corrected 

 for pressure at each depth). See footnote page 7. 



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