COIUMN 80 CAED TYPE 



For observed sample depths enter 3 in Column 80 to indicate an Observed 

 Detail Card. If interpolations are made by non-machine methods for 

 standard depths enter a 7 in Column 80. (Computed elements such as 

 sigma-t, sound velocity^ dynamic depth anomaly, etc. will be computed 

 for this type of card, but computations will be based on the temperature 

 and salinity as interpolated by the originator.) 



In a few instances only interpolated data may be available for certain stations. In that case the numeral 

 i is entered in Column 80. Such a card will be treated by the computer as though it were an observed level. 

 Stations based on such interpolated data will be appropriately marked "LIT" on listings. 



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